The Eastern Roman (Byzantine) imperial church headed by Constantinople continued to assert its universal authority. By the 13th century this assertion was becoming increasingly irrelevant as the Eastern Roman Empire shrank and the Ottoman Turks took over most of what was left of the Byzantine Empire (indirectly aided by invasions from the West). The other Eastern European churches in communion with Constantinople were not part of its empire and were increasingly acting independently, achieving autocephalous status and only nominally acknowledging Constantinople's standing in the Church hierarchy. In Western Europe the Holy Roman Empire fragmented making it less of an empire as well.
Constantinople was the capital city of the Roman Empire (330–395), of the Eastern Roman (Byzantine) Empire, of the brief Crusader state known as the Latin Empire (1204–1261) and of the Ottoman Empire (1453–1923). In 1923 the capital of Turkey, the successor state of the Ottoman Empire, was moved to Ankara and the name Constantinople was officially changed to Istanbul. The city is located in what is now the European side and the core of modern Istanbul. The city is still referred to as Constantinople in Greek-speaking sources.
The Ottoman Turks were the Turkish-speaking people of the Ottoman Empire. Reliable information about the early history of Ottoman Turks is scarce, but they take their Turkish name, Osmanlı, from the house of Osman I, the founder of the dynasty that ruled the Ottoman Empire for its entire 624 years. After the expansion from its home in Bithynia, the Ottoman principality began incorporating other Turkish-speaking Muslims and non-Turkish Christians. The Ottoman Turks blocked all land routes to Europe by conquering the city of Constantinople, the capital city of the Byzantine Empire, and Europeans had to find other ways to trade with Eastern countries.
The Byzantine Empire, also referred to as the Eastern Roman Empire or Byzantium, was the continuation of the Roman Empire in its eastern provinces during Late Antiquity and the Middle Ages, when its capital city was Constantinople. It survived the fragmentation and fall of the Western Roman Empire in the 5th century AD and continued to exist for an additional thousand years until it fell to the Ottoman Turks in 1453. During most of its existence, the empire was the most powerful economic, cultural and military force in Europe. "Byzantine Empire" is a term created after the end of the realm; its citizens continued to refer to their empire simply as the Roman Empire, or Romania (Ῥωμανία), and to themselves as "Romans".
Scholasticism originally began to reconcile the philosophy of the ancient classical philosophers with medieval Christian theology. It is not a philosophy or theology in itself, but a tool and method for learning which puts emphasis on dialectical reasoning. The primary purpose of scholasticism was to find the answer to a question or resolve a contradiction. It is most well known in its application in medieval theology, but was eventually applied to classical philosophy and many other fields of study.
Scholasticism was a medieval school of philosophy that employed a critical method of philosophical analysis presupposed upon a Christian theistic paradigm which dominated teaching in the medieval universities in Europe from about 1100 to 1700. It originated within the Christian monastic schools that were the basis of the earliest European universities. The rise of scholasticism was closely associated with the rise of the 12th and 13th century schools that developed into the earliest modern universities, including those in Italy, France, Spain and England.
Philosophy is the study of general and fundamental questions about existence, knowledge, values, reason, mind, and language. Such questions are often posed as problems to be studied or resolved. The term was probably coined by Pythagoras. Philosophical methods include questioning, critical discussion, rational argument, and systematic presentation. Classic philosophical questions include: Is it possible to know anything and to prove it? What is most real? Philosophers also pose more practical and concrete questions such as: Is there a best way to live? Is it better to be just or unjust? Do humans have free will?
In the 13th century there was an attempted suppression of various groups perceived as heterodox, such as the Cathars and Waldensians and the associated rise of the mendicant orders (notably the Franciscans and Dominicans), in part intended as a form of orthodox alternative to the heretical groups. Those two orders quickly became contexts for some of the most intense scholastic theologizing, producing such 'high scholastic' theologians as Alexander of Hales (Franciscan) and Thomas Aquinas (Dominican), or the rather less obviously scholastic Bonaventure (Franciscan). There was also a flourishing of mystical theology, with women such as Mechthild of Magdeburg playing a prominent role. In addition, the century can be seen as period in which the study of Natural Philosophy that could anachronistically be called 'science' began once again to flourish in the hands of such men as Robert Grosseteste and Roger Bacon.
The Waldensians, Vallenses, Valdesi or Vaudois) are an ascetic movement within Christianity, reputedly founded by Peter Waldo in Lyon around 1173.
Mendicant orders are, primarily, certain Christian religious orders that have adopted a lifestyle of poverty, traveling, and living in urban areas for purposes of preaching, evangelization, and ministry, especially to the poor. At their foundation these orders rejected the previously established monastic model. This foresaw living in one stable, isolated community where members worked at a trade and owned property in common, including land, buildings and other wealth. By contrast, the mendicants avoided owning property at all, did not work at a trade, and embraced a poor, often itinerant lifestyle. They depended for their survival on the goodwill of the people to whom they preached.
Alexander of Hales, also called Doctor Irrefragibilis and Theologorum Monarcha, was a theologian and philosopher important in the development of Scholasticism and of the Franciscan School.
Notable authors include:
Saint Dominic, also known as Dominic of Osma and Dominic of Caleruega, often called Dominic de Guzmán and Domingo Félix de Guzmán, was a Castilian priest and founder of the Dominican Order. Dominic is the patron saint of astronomers.
Robert Grosseteste was an English statesman, scholastic philosopher, theologian, scientist and Bishop of Lincoln. He was born of humble parents at Stradbroke in Suffolk. Upon his death, he was almost universally revered as a saint in England, but attempts to procure a formal canonisation failed. A. C. Crombie calls him "the real founder of the tradition of scientific thought in medieval Oxford, and in some ways, of the modern English intellectual tradition".
Saint Francis of Assisi, born Giovanni di Pietro di Bernardone, informally named as Francesco, was an Italian Catholic friar, deacon and preacher. He founded the men's Order of Friars Minor, the women's Order of Saint Clare, the Third Order of Saint Francis and the Custody of the Holy Land. Francis is one of the most venerated religious figures in history.
The monastic orders, especially the Benedictines, Cistercians, and Premonstratensians, continued to have an important role in the Catholic Church throughout the 13th century. The Mendicant Orders, which focused on poverty, preaching and other forms of pastoral ministry, were founded at this time. The four Mendicant Orders recognized by the Second Council of Lyon are:
The Catholic Church, also known as the Roman Catholic Church, is the largest Christian church, with approximately 1.3 billion baptised Catholics worldwide as of 2017. As the world's oldest and largest continuously functioning international institution, it has played a prominent role in the history and development of Western civilisation. The church is headed by the Bishop of Rome, known as the pope. Its central administration, the Holy See, is in the Vatican City, an enclave within the city of Rome in Italy.
The Second Council of Lyon was the fourteenth ecumenical council of the Catholic Church, convoked on 31 March 1272 and convened in Lyon, Kingdom of Arles, in 1274. Pope Gregory X presided over the council, called to act on a pledge by Byzantine emperor Michael VIII to reunite the Eastern church with the West. The council was attended by about 300 bishops, 60 abbots and more than a thousand prelates or their procurators, among whom were the representatives of the universities. Due to the great number of attendees, those who had come to Lyon without being specifically summoned were given "leave to depart with the blessing of God" and of the Pope. Among others who attended the council were James I of Aragon, the ambassador of the Emperor Michael VIII Palaiologos with members of the Greek clergy and the ambassadors of Abaqa Khan of the Ilkhanate. Thomas Aquinas had been summoned to the council, but died en route at Fossanova Abbey. Bonaventure was present at the first four sessions, but died at Lyon on 15 July 1274. As at the First Council of Lyon, Thomas Cantilupe was an English attender and a papal chaplain.
The Order of Preachers, also known as the Dominican Order, is a mendicant Catholic religious order founded by the Spanish priest Dominic of Caleruega in France, approved by Pope Innocent III via the Papal bull Religiosam vitam on 22 December 1216. Members of the order, who are referred to as Dominicans, generally carry the letters OP after their names, standing for Ordinis Praedicatorum, meaning of the Order of Preachers. Membership in the order includes friars, nuns, active sisters, and affiliated lay or secular Dominicans.
The Franciscans are a group of related mendicant religious orders within the Catholic Church, founded in 1209 by Saint Francis of Assisi. These orders include the Order of Friars Minor, the Order of Saint Clare, and the Third Order of Saint Francis. They adhere to the teachings and spiritual disciplines of the founder and of his main associates and followers, such as Clare of Assisi, Anthony of Padua, and Elizabeth of Hungary, among many others.
The term Augustinians, named after Augustine of Hippo (354–430), applies to two distinct types of Catholic religious orders, dating back to the first millennium but formally created in the 13th century, and some Anglican religious orders, created in the 19th century, though technically there is no "Order of St. Augustine" in Anglicanism. Within Anglicanism the Rule of St. Augustine is followed only by women, who form several different communities of Augustinian nuns in the Anglican Communion.
The Fourth Crusade, authorized by Innocent III in 1202, intended to retake the Holy Land but was soon subverted by Venetians who used the forces to sack the Christian city of Zara. Eventually the crusaders arrived in Constantinople, but rather than proceed to the Holy Land the crusaders instead sacked Constantinople and other parts of Asia Minor effectively establishing the Latin Empire of Constantinople in Greece and Asia Minor. This was effectively the last crusade sponsored by the papacy; later crusades were sponsored by individuals. Thus, though Jerusalem was held for nearly a century and other strongholds in the Near East remained in Christian possession much longer, the crusades in the Holy Land ultimately failed to establish permanent Christian kingdoms.
Crusades against Christians in the East by Roman Catholic crusaders was not exclusive to the Mediterranean though (see also the Northern Crusades and the Battle of the Ice). The sacking of Constantinople and the Church of Holy Wisdom and establishment of the Latin Empire as a seeming attempt to supplant the Orthodox Byzantine Empire in 1204 is viewed with some rancour to the present day. Many in the East saw the actions of the West as a prime determining factor in the weakening of Byzantium. This led to the empire's eventual conquest and fall to Islam. In 2004, Pope John Paul II extended a formal apology for the sacking of Constantinople in 1204; the apology was formally accepted by Patriarch Bartholomew of Constantinople. Many things that were stolen during this time: holy relics, riches, and many other items, are still held in various Western European cities, particularly Venice.
The crusades in southern Spain, southern Italy, and Sicily eventually lead to the demise of Islamic power in the regions; the Teutonic Knights expanded Christian domains in Eastern Europe; and the much less frequent crusades within Christendom, such as the Albigensian Crusade, achieved their goal of maintaining doctrinal unity.
The Fourth Crusade was initiated in 1202 by Pope Innocent III, with the intention of invading the Holy Land through Egypt. Because the Crusaders lacked the funds to pay for the fleet and provisions that they had contracted from the Venetians, Doge Enrico Dandolo enlisted the crusaders to restore the Christian city of Zara (Zadar) to obedience. Because they subsequently lacked provisions and time on their vessel lease, the leaders decided to go to Constantinople, where they attempted to place a Byzantine exile on the throne. After a series of misunderstandings and outbreaks of violence, the Crusaders sacked the city in 1204 and established the so-called Latin Empire and a series of other Crusader states throughout the territories of the Greek Byzantine Empire. This is often seen as the final breaking point of the Great Schism between the Eastern Orthodox Church and (Western) Roman Catholic Church.
After the Sack of Constantinople, much of Asia Minor was brought under Roman Catholic rule, and the Latin Empire of the East was established. As the conquest by the European crusaders was not exclusive to the fourth crusade, many various kingdoms of European rule were established. After the fall of Constantinople to the Latin West the Empire of Nicaea was established, which was later to be origin of the Greek monarchy that defeated the Latin forces of Europe and re-established Orthodox Monarchy in Constantinople and Asia Minor.
Crusades against Christians in the East by Roman Catholic crusaders were not exclusive to the fourth crusade nor the Mediterranean. The sacking of Constantinople and the Church of Holy Wisdom, the destruction of the Monastery of Stoudios, Library of Constantinople and the establishment of the Latin Empire in Constantinople and also throughout West Asia Minor and Greece (see the Kingdom of Thessalonica, Kingdom of Cyprus) are considered definitive though. This is in light of perceived Roman Catholic atrocities not exclusive to the capital city of Constantinople in 1204 starting the period in the East referred to as Frangokratia. The establishment of the Latin Empire in 1204 was intended to supplant the Orthodox Byzantine Empire. This is symbolized by many Orthodox churches being converted into Roman Catholic properties and churches like Hagia Sophia and Church of the Pantokrator, and it is viewed with some rancour to the present day. Some of the European Christian community actively endorsed the attacking of Eastern Christians.
This was preceded by a European backed attempted conquest of Byzantium, Greece, and Bulgaria and other Eastern Christian countries which led to the establishment of the Latin Empire of the East and the Latin Patriarch of Constantinople (with various other Crusader states).
The Teutonic Order's attempts to conquer Orthodox Russia (particularly the Republics of Pskov and Novgorod), an enterprise endorsed by Pope Gregory IX,can also be considered as a part of the Northern Crusades. One of the major blows for the idea of the conquest of Russia was the Battle of the Ice in 1242. With or without the Pope's blessing, Sweden also undertook several crusades against Orthodox Novgorod. Many in the East saw the actions of the West in the Mediterranean as a prime determining factor in the weakening of Byzantium which led to the empire's eventual conquest and fall to Islam.
The Albigensian Crusade was launched in 1209 to eliminate the heretical Cathars of Occitania (the south of modern-day France). It was a decade-long struggle that had as much to do with the concerns of northern France to extend its control southwards as it did with heresy. In the end, both the Cathars and the independence of southern France were exterminated.
After a papal legate was murdered by the Cathars in 1208, Pope Innocent III declared the Albigensian Crusade.Abuses committed during the crusade caused Innocent III to informally institute the first papal inquisition to prevent future aberrational practices and to root out the remaining Cathars. Formalized under Pope Gregory IX, this Medieval inquisition executed an average of three people per year for heresy at its height. Over time, other inquisitions were launched by the Church or secular rulers to prosecute heretics, to respond to the threat of Moorish invasion or for political purposes. The accused were encouraged to recant their heresy and those who did not could be punished by penance, fines, imprisonment, torture or execution by burning.
The Children's Crusade is a series of possibly fictitious or misinterpreted events of 1212. The story is that an outburst of the old popular enthusiasm led a gathering of children in France and Germany, which Pope Innocent III interpreted as a reproof from heaven to their unworthy elders. The leader of the French army, Stephen, led 30,000 children. The leader of the German army, Nicholas, led 7,000 children. None of the children actually reached the Holy Land; those who did not return home or settle along the route to Jerusalem either died from shipwreck or hunger, or were sold into slavery in Egypt or North Africa.
By processions, prayers, and preaching, the Church attempted to set another crusade afoot, and the Fourth Council of the Lateran (1215) formulated a plan for the recovery of the Holy Land. In the first phase, a crusading force from Austria and Hungary joined the forces of the king of Jerusalem and the prince of Antioch to take back Jerusalem. In the second phase, crusader forces achieved a remarkable feat in the capture of Damietta in Egypt in 1219, but under the urgent insistence of the papal legate, Pelagius, they launched a foolhardy attack on Cairo in July 1221. The crusaders were turned back after their dwindling supplies led to a forced retreat. A night-time attack by Sultan Al-Kamil resulted in a great number of crusader losses and eventually in the surrender of the army. Al-Kamil agreed to an eight-year peace agreement with Europe.
Emperor Frederick II had repeatedly vowed a crusade but failed to live up to his words, for which he was excommunicated by Pope Gregory IX in 1228. He nonetheless set sail from Brindisi, landed in Palestine, and through diplomacy he achieved unexpected success: Jerusalem, Nazareth, and Bethlehem were delivered to the crusaders for a period of ten years.
In 1229 after failing to conquer Egypt, Frederick II of the Holy Roman Empire made a peace treaty with Al-Kamil. This treaty allowed Christians to rule over most of Jerusalem, while the Muslims were given control of the Dome of the Rock and the Al-Aksa mosque. The peace brought about by this treaty lasted for about ten years.Many of the Muslims though were not happy with Al-Kamil for giving up control of Jerusalem, and in 1244, following a siege, the Muslims regained control of the city.
The papal interests represented by the Knights Templar brought on a conflict with Egypt in 1243, and in the following year a Khwarezmian force summoned by the Templars stormed Jerusalem. The crusaders were drawn into battle at La Forbie in Gaza. The crusader army and its Bedouin mercenaries were defeated by Baibars' force of Khwarezmian tribesmen. This battle is considered by many historians to have been the death knell to the Kingdom of Outremer.
Although this provoked no widespread outrage in Europe as the fall of Jerusalem in 1187 had done, Louis IX of France organized a crusade against Egypt from 1248 to 1254, leaving from the newly constructed port of Aigues-Mortes in southern France. It was a failure, and Louis spent much of the crusade living at the court of the crusader kingdom in Acre. In the midst of this crusade was the first Shepherds' Crusade in 1251.
The Eighth Crusade was organized by Louis IX in 1270, again sailing from Aigues-Mortes, initially to come to the aid of the remnants of the crusader states in Syria. However, the crusade was diverted to Tunis, where Louis spent only two months before dying. For his efforts, Louis was later canonised.
The future Edward I of England undertook another expedition against Baibars in 1271, after having accompanied Louis on the Eighth Crusade. The Ninth Crusade was deemed a failure and ended the Crusades in the Middle East.
In their later years, faced with the threat of the Egyptian Mamluks, the Crusaders' hopes rested with a Franco-Mongol alliance. Although the Mongols successfully attacked as far south as Damascus on these campaigns, the ability to effectively coordinate with Crusades from the west was repeatedly frustrated most notably at the Battle of Ain Jalut in 1260. The Mamluks eventually made good their pledge to cleanse the entire Middle East of the Franks. With the fall of Antioch (1268), Tripoli (1289), and Acre (1291), those Christians unable to leave the cities were massacred or enslaved, and the last traces of Christian rule in the Levant disappeared.
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The Teutonic Order's attempts to conquer Orthodox Russia (particularly the Republics of Pskov and Novgorod), an enterprise endorsed by Pope Gregory IX, can be considered as a part of the Northern Crusades. One of the major blows for the idea of the conquest of Russia was the Battle of the Ice in 1242. With or without the Pope's blessing, Sweden also undertook several crusades against Orthodox Novgorod.
Between 1232 and 1234, there was a crusade against the Stedingers. This crusade was special, because the Stedingers were not heathens or heretics, but fellow Roman Catholics. They were free Frisian farmers who resented attempts of the count of Oldenburg and the archbishop Bremen-Hamburg to make an end to their freedoms. The archbishop excommunicated them, and Pope Gregory IX declared a crusade in 1232. The Stedingers were defeated in 1234.
The Aragonese Crusade, or Crusade of Aragón, was declared by Pope Martin IV against the King of Aragón, Peter III the Great, in 1284 and 1285.
In 1259 Mongols led by Burundai and Nogai Khan ravaged the principality of Halych-Volynia, Lithuania and Poland. After that Pope Alexander IV tried without success to create a crusade against the Blue Horde.
The Second Council of Lyon was convoked to act on a pledge by Byzantine emperor Michael VIII to reunite the Eastern church with the West.Wishing to end the Great Schism that divided Rome and Constantinople, Gregory X had sent an embassy to Michael VIII Palaeologus, who had reconquered Constantinople, putting an end to the remnants of the Latin Empire in the East, and he asked Latin despots in the East to curb their ambitions. On June 29, 1274, Gregory X celebrated a mass in St John's Church, where both sides took part. The council declared that the Roman church possessed "the supreme and full primacy and authority over the universal Catholic Church."
The council was seemingly a success but did not provide a lasting solution to the schism; the emperor was anxious to heal the schism, but the Eastern clergy proved to be obstinate. However, Michael VII's son and successor Andronicus II repudiated the union.
Mongol rule in Kievan Rus lasted from the 13th (Genghis Khan's army entered Kievan Rus in 1220s) through the 15th century, the Rus' church enjoyed a favored position, obtaining immunity from taxation in 1270. Through a series of wars with Muslim countries the church did indeed establish itself as the protector of Orthodoxy.
Pope Innocent III, born Lotario dei Conti di Segni reigned from 8 January 1198 to his death in 1216.
The 13th century was the century which lasted from January 1, 1201 through December 31, 1300 in accordance with the Julian calendar. After its conquests in Asia the Mongol Empire stretched from Eastern Asia to Eastern Europe, while the Muslim Delhi Sultanate conquered large parts of the Indian subcontinent. In the history of European culture, this period is considered part of the High Middle Ages.
The Fourth Crusade (1202–1204) was a Latin Christian armed expedition called by Pope Innocent III. The stated intent of the expedition was to recapture the Muslim-controlled city of Jerusalem, by first conquering the powerful Egyptian Ayyubid Sultanate, the strongest Muslim state of the time. However, a sequence of economic and political events culminated in the Crusader army sacking the city of Constantinople, the capital of the Greek Christian-controlled Byzantine Empire.
The Empire of Romania, more commonly known in historiography as the Latin Empire or Latin Empire of Constantinople, and known to the Byzantines as the Frankokratia or the Latin Occupation, was a feudal Crusader state founded by the leaders of the Fourth Crusade on lands captured from the Byzantine Empire. It was established after the capture of Constantinople in 1204 and lasted until 1261. The Latin Empire was intended to supplant the Byzantine Empire as the titular Roman Empire in the east, with a Western Roman Catholic emperor enthroned in place of the Eastern Orthodox Roman emperors.
The Latin Patriarchate of Constantinople was an office established as a result of the Fourth Crusade and its conquest of Constantinople in 1204. It was a Roman Catholic replacement for the Eastern Orthodox Ecumenical Patriarchate of Constantinople, and remained in the city until the reconquest of Constantinople by the Byzantines in 1261, whereupon it became a titular see. The office was finally abolished in 1964.
The Latin Patriarchate of Jerusalem is the Catholic episcopal see of Jerusalem, officially seated in the Church of the Holy Sepulchre. It was originally established in 1099 with the Kingdom of Jerusalem encompassing the newly territories in the Holy Land conquered by the First Crusade. From 1374-1847 it was a titular see, with the Patriarchs of Jerusalem being based at the Basilica di San Lorenzo fuori le Mura in Rome. A resident Latin Patriarch was re-established in 1847 by Pius IX.
Patriarch of Antioch is a traditional title held by the Bishop of Antioch As the traditional "overseer" of the first gentile Christian community, the position has been of prime importance in the church from its earliest period. This diocese is one of the few for which the names of its bishops from the apostolic beginnings have been preserved. Today five churches use the title of Patriarch of Antioch: the Syriac Orthodox Church, the Greek Orthodox Church of Antioch, the Syriac Catholic Church, the Melkite Greek Catholic Church, and the Maronite Church. Historically, there has also been a Latin Patriarch of Antioch.
The High Middle Ages, or High Medieval Period, was the period of European history that commenced around 1000 and lasted until around 1250. The High Middle Ages were preceded by the Early Middle Ages and were followed by the Late Middle Ages, which ended around 1500.
The East–West Schism, also called the Great Schism and the Schism of 1054, was the break of communion between what are now the Catholic Church and Eastern Orthodox Churches, which had lasted until the 11th century. The Schism was the culmination of theological and political differences between the Christian East and West which had developed over the preceding centuries.
The Melkite Greek Catholic Church is an Eastern Catholic Church in full communion with the Holy See as part of the worldwide Catholic Church. It is headed by Patriarch Youssef Absi, S.M.S.P., headquartered in Cathedral of Our Lady of the Dormition, Damascus, Syria. The Melkites, Byzantine Rite Catholics, trace their history to the early Christians of Antioch, formerly part of Syria and now in Turkey, of the 1st century AD, where Christianity was introduced by Saint Peter.
The crusades were a series of religious wars sanctioned by the Latin Church in the medieval period. The best known crusades are the campaigns in the eastern Mediterranean aimed at recovering the Holy Land from Muslim rule. The term crusade is now also applied to other church-sanctioned and even non-religious campaigns. These were fought for a variety of reasons including the suppression of paganism and heresy, the resolution of conflict among rival Roman Catholic groups, or for political and territorial advantage. At the time of the early crusades, the word did not exist and it only became the leading descriptive term in English around the year 1760.
The history of the Eastern Orthodox Church is traced back to Jesus Christ and the Apostles. The Apostles appointed successors, known as bishops, and they in turn appointed other bishops in a process known as Apostolic succession. Over time, five Patriarchates were established to organize the Christian world, and four of these ancient Patriarchates remain Orthodox today. Orthodox Christianity reached its present form in Late Antiquity, when the Ecumenical Councils were held, doctrinal disputes were resolved, the Fathers of the Church lived and wrote, and Orthodox worship practices settled into their permanent form.
The history of Jerusalem during the Middle Ages is generally one of decline; beginning as a major city in the Byzantine Empire, Jerusalem prospered during the early centuries of Muslim control (640–969), but under the rule of the Fatimid caliphate its population declined from about 200,000 to less than half that number by the time of the Christian conquest in 1099. The Christians massacred much of the population as they took the city, and while population quickly recovered during the Kingdom of Jerusalem, it was again decimated to below 2,000 people when the Khwarezmi Turks retook the city in 1244. After this, the city remained a backwater of the late medieval Muslim empires and would not again exceed a population of 10,000 until the 16th century. It was passed back and forth through various Muslim factions until decidedly conquered by the Ottomans in 1517, who maintained control until the British took it in 1917.
The siege and sack of Constantinople occurred in April 1204 and marked the culmination of the Fourth Crusade. Crusader armies captured, looted, and destroyed parts of Constantinople, the capital of the Byzantine Empire. After the capture of the city, the Latin Empire was established and Baldwin of Flanders was crowned Emperor Baldwin I of Constantinople in the Hagia Sophia.
History of the East–West Schism refers to history of the East–West Schism that occurred in 1054, representing one of the most significant events in the history of Christianity. It includes various events and processes that led to the Schism, and also those events and processes that occurred as a result of the Schism. Eastern and Western Christians had a history of differences and disagreements, some dating back even to the period of Early Christianity. At the very root of what later became the Great Schism were several questions of pneumatology and ecclesiology. The most important theological difference occurred over various questions regarding the procession of the Holy Spirit, and the use of the Filioque clause in the Creed. One of the main ecclesiological issues was the question of Papal supremacy. Other points of difference were related to various liturgical, mainly ritual and disciplinary customs and practices. Some political and cultural processes also contributed to the breakout of the Schism.
Christianity in the 11th century is marked primarily by the Great Schism of the Church, which formally divided the State church of the Roman Empire into Eastern (Greek) and Western (Latin) branches.
Christianity in the Middle Ages covers the history of Christianity from the Fall of the Western Roman Empire until the Fall of Constantinople (1453), which is usually taken to make the end of the Middle Ages in the History of Europe.
The following outline is provided as an overview of and topical guide to the Catholic Church:
This is a timeline of the presence of Orthodoxy in Greece. The history of Greece traditionally encompasses the study of the Greek people, the areas they ruled historically, as well as the territory now composing the modern state of Greece.