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Millennium: 2nd millennium
1204 in various calendars
Gregorian calendar 1204
Ab urbe condita 1957
Armenian calendar 653
Assyrian calendar 5954
Balinese saka calendar 1125–1126
Bengali calendar 611
Berber calendar 2154
English Regnal year 5  Joh. 1   6  Joh. 1
Buddhist calendar 1748
Burmese calendar 566
Byzantine calendar 6712–6713
Chinese calendar 癸亥(Water  Pig)
3900 or 3840
甲子年 (Wood  Rat)
3901 or 3841
Coptic calendar 920–921
Discordian calendar 2370
Ethiopian calendar 1196–1197
Hebrew calendar 4964–4965
Hindu calendars
 - Vikram Samvat 1260–1261
 - Shaka Samvat 1125–1126
 - Kali Yuga 4304–4305
Holocene calendar 11204
Igbo calendar 204–205
Iranian calendar 582–583
Islamic calendar 600–601
Japanese calendar Kennin 4 / Genkyū 1
Javanese calendar 1112–1113
Julian calendar 1204
Korean calendar 3537
Minguo calendar 708 before ROC
Nanakshahi calendar −264
Thai solar calendar 1746–1747
Tibetan calendar 阴水猪年
(female Water-Pig)
1330 or 949 or 177
(male Wood-Rat)
1331 or 950 or 178

Year 1204 ( MCCIV ) was a leap year starting on Thursday (link will display the full calendar) of the Julian calendar.

Roman numerals Numbers in the Roman numeral system

Roman numerals are a numeral system that originated in ancient Rome and remained the usual way of writing numbers throughout Europe well into the Late Middle Ages. Numbers in this system are represented by combinations of letters from the Latin alphabet. Modern usage employs seven symbols, each with a fixed integer value:

A leap year starting on Thursday is any year with 366 days that begins on Thursday 1 January, and ends on Friday 31 December. Its dominical letters hence are DC, such as the years 1880, 1920, 1948, 1976, 2004, 2032, 2060, and 2088, in the Gregorian calendar or, likewise, 1988, 2016, and 2044 in the obsolete Julian calendar. Any leap year that starts on Monday, Wednesday or Thursday has two Friday the 13ths. This leap year contains two Friday the 13ths in February and August.

The Julian calendar, proposed by Julius Caesar in 708 AUC (46 BC/BCE), was a reform of the Roman calendar. It took effect on 1 January 709 AUC (45 BC/BCE), by edict. It was the predominant calendar in the Roman world, most of Europe, and in European settlements in the Americas and elsewhere, until it was gradually replaced by the Gregorian calendar, promulgated in 1582 by Pope Gregory XIII.



January is the first month of the year in the Julian and Gregorian calendars and the first of seven months to have a length of 31 days. The first day of the month is known as New Year's Day. It is, on average, the coldest month of the year within most of the Northern Hemisphere and the warmest month of the year within most of the Southern Hemisphere. In the Southern hemisphere, January is the seasonal equivalent of July in the Northern hemisphere and vice versa.

Guttorm Sigurdsson was the King of Norway from January to August 1204, during the Norwegian civil war era. As a grandson of King Sverre, he was proclaimed king by the Birkebeiner party when he was just four years old. Although obviously not in control of the events surrounding him, Guttorm's accession to the throne under the effective regency of Haakon the Crazy led to renewed conflict between the Birkebeiner and the Bagler parties, the latter supported militarily by Valdemar II of Denmark.

Norway Country in Northern Europe

Norway, officially the Kingdom of Norway, is a Nordic country in Northern Europe whose territory comprises the western and northernmost portion of the Scandinavian Peninsula; the remote island of Jan Mayen and the archipelago of Svalbard are also part of the Kingdom of Norway. The Antarctic Peter I Island and the sub-Antarctic Bouvet Island are dependent territories and thus not considered part of the kingdom. Norway also lays claim to a section of Antarctica known as Queen Maud Land.

Conquest of Constantinople by the Crusaders ConquestOfConstantinopleByTheCrusadersIn1204.jpg
Conquest of Constantinople by the Crusaders

April 13 is the 103rd day of the year in the Gregorian calendar. 262 days remain until the end of the year.

Fourth Crusade 1204 Crusade that captured Constantinople rather than Jerusalem

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.

Constantinople capital city of the Eastern Roman or Byzantine Empire, the Latin and the Ottoman Empire

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.


April 14 is the 104th day of the year in the Gregorian calendar. 261 days remain until the end of the year.

Henry I of Castile King of Castile

Henry I of Castile was king of Castile. He was the son of Alfonso VIII of Castile and Eleanor of England, Queen of Castile. He was the brother of Berenguela and Mafalda of Castile.

Kingdom of Castile Medieval state in the Iberian Peninsula

The Kingdom of Castile was a large and powerful state located on the Iberian Peninsula during the Middle Ages. Its name comes from the host of castles constructed in the region. It began in the 9th century as the County of Castile, an eastern frontier lordship of the Kingdom of León. During the 10th century its counts increased their autonomy, but it was not until 1065 that it was separated from León and became a kingdom in its own right. Between 1072 and 1157 it was again united with León, and after 1230 this union became permanent. Throughout this period the Castilian kings made extensive conquests in southern Iberia at the expense of the Islamic principalities. The Kingdoms of Castile and of León, with their southern acquisitions, came to be known collectively as the Crown of Castile, a term that also came to encompass overseas expansion.


January 1 is the first day of the year in the Gregorian Calendar. There are 364 days remaining until the end of the year. This day is known as New Year's Day since the day marks the beginning of the year. It is also the first day of the first quarter of the year and the first half of the year.

Haakon III Sverresson was King of Norway from 1202 to 1204.

Isaac II Angelos Byzantine emperor

Isaac II Angelos was Byzantine Emperor from 1185 to 1195, and again from 1203 to 1204.

Related Research Articles

Alexios III Angelos Byzantine Emperor

Alexios III Angelos was Byzantine Emperor from March 1195 to July 17/18, 1203. A member of the extended imperial family, Alexios came to throne after deposing, blinding, and imprisoning his younger brother Isaac II Angelos. The most significant event of his reign was the attack of the Fourth Crusade on Constantinople in 1203, on behalf of Alexios IV Angelos. Alexios III took over the defense of the city, which he mismanaged, then fled the city at night with one of his three daughters. From Adrianople, and then Mosynopolis, he unsuccessfully attempted to rally his supporters, only to end up a captive of Marquis Boniface of Montferrat. He was ransomed, sent to Asia Minor where he plotted against his son-in-law Theodore Laskaris, but was eventually arrested and spent his last days confined to the Monastery of Hyakinthos in Nicaea, where he died.

The 1200s began on January 1, 1200, and ended on December 31, 1209.

Theodore I Laskaris 13th-century emperor of Nicaea

Theodoros I Komnenos Laskaris was the first Emperor of Nicaea.

Baldwin I, Latin Emperor Latin Emperor of Constantinople

Baldwin I was the first emperor of the Latin Empire of Constantinople. As Count of Flanders and Hainaut, he was one of the most prominent leaders of the Fourth Crusade, which resulted in the sack of Constantinople and the conquest of large parts of the Byzantine Empire, and the foundation of the Latin Empire. He lost his final battle to Kaloyan, the emperor of Bulgaria, and spent his last days as his prisoner.

Theodore Branas or Vranas, sometimes called Theodore Komnenos Branas, was a general under the Byzantine Empire and afterwards under the Latin Empire of Constantinople. Under the Latin regime he was given the title Caesar and in 1206 he became governor and lord of Adrianople. He is called Livernas by western chroniclers of the Fourth Crusade, including Geoffroi de Villehardouin.

Kingdom of Thessalonica

The Kingdom of Thessalonica was a short-lived Crusader State founded after the Fourth Crusade over conquered Byzantine lands in Macedonia and Thessaly.

AlexiosBranas or Vranas was a Byzantine nobleman, attempted usurper, and the last Byzantine military leader of the 12th century to gain a notable success against a foreign enemy.

Eudokia Angelina was the consort of Stefan the First-Crowned of Serbia from c. 1190 to c. 1200. She later remarried, to Alexios V Doukas, who briefly ruled as Emperor of Byzantium in 1204. She was a daughter of Alexios III Angelos and Euphrosyne Doukaina Kamatera.

Kaykhusraw I Sultan of Rum

Kaykhusraw I, the eleventh and youngest son of Kilij Arslan II, was Seljuk Sultan of Rûm. He succeeded his father in 1192, but had to fight his brothers for control of the Sultanate, losing to his brother Suleiman II in 1196. He ruled it 1192-1196 and 1205-1211.

The Duchy of Philippopolis was a short-lived duchy of the Latin Empire founded after the collapse and partition of the Byzantine Empire by the Fourth Crusade in 1204. It included the city of Philippopolis and the surrounding region.

Marie of Brienne Latin empress of Constantinople

Marie of Brienne was Latin Empress as the wife of Baldwin II of Courtenay. She served as regent during the absence of Baldwin II twice: in 1237–1239, and in 1243–1257.

Filocalo Navigajoso was a Venetian nobleman and first Latin ruler of the island of Lemnos in Greece.

Battle of the Rhyndacus (1211)

The Battle of the Rhyndacus was fought on 15 October 1211 between the forces of two of the main successor states of the Byzantine Empire, the Latin Empire and the Byzantine Greek Empire of Nicaea, established following the dissolution of the Byzantine state after the Fourth Crusade.

The Battle of Poimanenon or Poemanenum was fought in early 1224 between the forces of the two main successor states of the Byzantine Empire; the Latin Empire and the Byzantine Greek Empire of Nicaea. The opposing forces met at Poimanenon, south of Cyzicus in Mysia, near Lake Kuş.

Isaac Laskaris was a brother of Nicaean emperor Theodore I Laskaris, who along with his brother Alexios Laskaris fled to the Latin Empire and unsuccessfully tried to topple Theodore's successor, John III Doukas Vatatzes, in 1224.

Alexios Laskaris was a brother of Nicaean emperor Theodore I Laskaris, who along with his brother Isaac Laskaris fled to the Latin Empire and unsuccessfully tried to topple Theodore's successor, John III Doukas Vatatzes, in 1224.

Berthold II von Katzenelnbogen was a German nobleman of the family of the Counts of Katzenelnbogen and a participant in the Fourth Crusade (1202–04), who became lord of Velestino (c.1205–17) and regent of the Kingdom of Thessalonica (c.1217) in Frankish Greece. He was a patron of poets and in politics a Ghibelline.

Constantine Komnenos Maliasenos Doukas Bryennios was a Byzantine Greek nobleman and magnate active in Thessaly in the first half of the 13th century.

Eustace of Flanders or Eustace of Hainaut was a member of the House of Flanders, brother of the Latin Emperors Baldwin I and Henry, and regent of the Kingdom of Thessalonica in 1209–1216.

The Podestà of Constantinople was the official in charge of Venetian possessions in the Latin Empire and the Venetian quarter of Constantinople during the 13th century. Nominally a vassal to the Latin Emperor, the Podestà functioned as a ruler in his own right, and answered to the Doge of Venice. The podestà was also officially known as Governor of One-Fourth and One-Half of the Empire of Romania and was entitled to wearing the crimson buskins as the emperors.


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