Year 1205 (MCCV) was a common year starting on Saturday of the Julian calendar.
Isaac II Angelos or Angelus was Byzantine Emperor from 1185 to 1195, and co-Emperor with his son Alexios IV Angelos from 1203 to 1204. In a 1185 revolt against the Emperor Andronikos Komnenos, Isaac seized power and rose to the Byzantine throne establishing the Angelos family as the new imperial dynasty.
Theodore I Laskaris or Lascaris was the first emperor of Nicaea—a successor state of the Byzantine Empire—from 1205 to his death. Although he was born to an obscure aristocratic family, his mother was related to the imperial Komnenos clan. He married Anna, a younger daughter of Emperor Alexios III Angelos in 1200. He received the title of despot before 1203, demonstrating his right to succeed his father-in-law on the throne.
Henry was Latin emperor of Constantinople from 1205 until his death in 1216. He was one of the leaders of the Fourth Crusade in which the Byzantine Empire was conquered and Latin Empire formed.
The Latin Empire, also referred to as the Latin Empire of Constantinople, was a feudal Crusader state founded by the leaders of the Fourth Crusade on lands captured from the Byzantine Empire. The Latin Empire was intended to replace the Byzantine Empire as the Western-recognized Roman Empire in the east, with a Catholic emperor enthroned in place of the Eastern Orthodox Roman emperors. The main objective of the Latin Empire was planned by Venice, which promoted the creation of this state for their self-benefit.
Kaloyan or Kalojan, also known as Ivan I, Ioannitsa or Johannitsa, the Romanslayer, was emperor or tsar of Bulgaria from 1196 to 1207. He was the younger brother of Theodor and Asen, who led the anti-Byzantine uprising of the Bulgarians and Vlachs in 1185. The uprising ended with the restoration of Bulgaria as an independent state. He spent a few years as a hostage in Constantinople in the late 1180s. Theodor, crowned Emperor Peter II, made him his co-ruler after Asen was murdered in 1196. A year later, Peter was also murdered, and Kaloyan became the sole ruler of Bulgaria.
The Empire of Nicaea or the Nicene Empire is the conventional historiographic name for the largest of the three Byzantine Greek rump states founded by the aristocracy of the Byzantine/Roman Empire that fled when Constantinople was occupied by Western European and Venetian armed forces during the Fourth Crusade, a military event known as the Sack of Constantinople. Like the other Byzantine rump states that formed due to the 1204 fracturing of the empire, such as the Empire of Trebizond and the Despotate of Epirus, it was a continuation of the eastern half of the Roman Empire that survived well into the medieval period. A fourth state, known in historiography as the Latin Empire, was established by an army of Crusaders and the Republic of Venice after the capture of Constantinople and the surrounding environs.
Michael I Komnenos Doukas, Latinized as Comnenus Ducas, and in modern sources often recorded as Michael I Angelos, a name he never used, was the founder and first ruler of the Despotate of Epirus from c. 1205 until his assassination in 1214/15.
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.
Theodore Komnenos Doukas was the ruler of Epirus and Thessaly from 1215 to 1230 and of Thessalonica and most of Macedonia and western Thrace from 1224 to 1230. He was also the power behind the rule of his sons John and Demetrios over Thessalonica in 1237–1246.
The House of Laskaris or Lascaris was a Byzantine Greek noble family which rose to prominance during the Late Byzantine period. The members of the family formed the ruling dynasty of the Empire of Nicaea, a Byzantine rump state that existed from the 1204 sack of Constantinople by the Fourth Crusade until the restoration of the Empire under the Palaeologan dynasty in 1261.
David Komnenos was one of the founders of the Empire of Trebizond and its joint ruler together with his brother Alexios until his death. At least two lead seals and an inscription found on a tower in Heraclea Pontica attest that he was the first of his family to use the style Megas Komnenos. Ηe was the son of Manuel Komnenos and grandson of the Emperor Andronikos I.
Manuel Komnenos Maurozomes was a Byzantine nobleman who in the aftermath of the Fourth Crusade tried to found an independent principality in Phrygia. His daughter, named Dawlat Raziya Khatun, was married to the Seljuk sultan Kaykhusraw I, and he eventually became governor (emir) of part of the region under Seljuk control; he was an influential figure in the Seljuk court until his death.
The Bulgarian–Latin wars were a series of conflicts between the Second Bulgarian Empire (1185–1396) and the Latin Empire (1204–61). The wars affected the northern border of the Latin Empire throughout its existence.
Constantine Laskaris may have been Byzantine Emperor for a few months from 1204 to early 1205. He is sometimes called "Constantine XI", a numeral now usually reserved for Constantine Palaiologos.
The Battle of Antioch on the Meander was a military engagement near Antioch-on-the-Meander between the forces of the Empire of Nicaea and the Seljuk Sultanate of Rûm. The Turkish defeat ensured continued Nicaean hegemony of the Aegean coast of Asia Minor. The Seljuk sultan, Kaykhusraw I, was killed on the field of battle. The battle took place near the modern town of Yamalak in Kuyucak district in Aydın Province.
The battle of Rusion occurred in the winter of 1206 near the fortress of Rusion between the armies of the Bulgarian Empire and the Latin Empire of Byzantium. The Bulgarians scored a major victory.
Theodore Mangaphas or Mankaphas was a Greek nobleman from Philadelphia, who assumed the title of Byzantine emperor twice, first during the reign of Isaac II Angelos, and secondly after the sacking of Constantinople during the Fourth Crusade.
Theodore II Eirenikos, , also known as Theodore Kopas or Koupas (Κωπάς/Κουπάς), was a high-ranking Byzantine official and chief minister during most of the reign of the Byzantine emperor Alexios III Angelos. After the fall of Constantinople to the Fourth Crusade, he fled to the Empire of Nicaea, where he became a monk and served as Patriarch of Constantinople in exile in 1214–1216.
The Nicaean–Latin wars were a series of wars between the Latin Empire and the Empire of Nicaea, starting with the dissolution of the Byzantine Empire by the Fourth Crusade in 1204. The Latin Empire was aided by other Crusader states established on Byzantine territory after the Fourth Crusade, as well as the Republic of Venice, while the Empire of Nicaea was assisted occasionally by the Second Bulgarian Empire, and sought the aid of Venice's rival, the Republic of Genoa. The conflict also involved the Greek state of Epirus, which also claimed the Byzantine inheritance and opposed Nicaean hegemony. The Nicaean reconquest of Constantinople in 1261 AD and the restoration of the Byzantine Empire under the Palaiologos dynasty did not end the conflict, as the Byzantines launched on and off efforts to reconquer Southern Greece and the Aegean islands until the 15th century, while the Latin powers, led by the Angevin Kingdom of Naples, tried to restore the Latin Empire and launched attacks on the Byzantine Empire.
