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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.
Stefan Radoslav, also known as Stephanos Doukas, was the King of Serbia, from 1228 to 1233.
Stefan Nemanjić, or Stephen the First-Crowned, was the Grand Prince of Serbia from 1196 and the King of Serbia from 1217 until his death in 1228. He was the first Rascian king; due to his transformation of the Serbian Grand Principality into the Kingdom of Serbia and the assistance he provided his brother Saint Sava in establishing the Serbian Orthodox Church, he is regarded one of the most important members of the Nemanjić dynasty.
Kaloyan or Kalojan, also known as Ivan I, Ioannitsa or Johannitsa, 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.
Ivan Asen I, also known as Asen I or John Asen I, was emperor or tsar of Bulgaria from 1187/1188 to 1196 as co-ruler with his elder brother, Peter II. Hailing from the Byzantine theme of Paristrion, his exact place and date of birth are unknown. Although most contemporaneous chronicles describe Asen and his brothers, Theodor (Peter) and Kaloyan, as Vlachs, they were probably of mixed Vlach, Bulgarian, and Cuman ancestry.
Boril was the emperor (tsar) of Bulgaria from 1207 to 1218. He was the son of an unnamed sister of his predecessor, Kaloyan and Kaloyan's brothers, Peter II and Ivan Asen I, who had restored the independent Bulgarian state. After Kaloyan died unexpectedly in October 1207, Boril married his widow, a Cuman princess and seized the throne. His cousin, Ivan Asen, fled from Bulgaria, enabling Boril to strengthen his position. His other kinsmen, Strez and Alexius Slav, refused to acknowledge him as the lawful monarch. Strez took possession of the land between the Struma and Vardar rivers with the support of Stefan Nemanjić of Serbia. Alexius Slav secured his rule in the Rhodope Mountains with the assistance of Henry, the Latin Emperor of Constantinople.
Michael II Asen was emperor (tsar) of Bulgaria from 1246 to 1256 or 1257. He was the son of Ivan Asen II and Irene Komnene Doukaina. He succeeded his half-brother, Kaliman I Asen. His mother or other relative must have ruled Bulgaria during his minority.
Ivan Alexander, also sometimes Anglicized as John Alexander, ruled as Emperor (Tsar) of Bulgaria from 1331 to 1371, during the Second Bulgarian Empire. The date of his birth is unknown. He died on 17 February 1371. The long reign of Ivan Alexander is considered a transitional period in Bulgarian medieval history. Ivan Alexander began his rule by dealing with internal problems and external threats from Bulgaria's neighbours, the Byzantine Empire and Serbia, as well as leading his empire into a period of economic recovery and cultural and religious renaissance.
Konstantin Tih or Constantine I Tikh, was the tsar of Bulgaria from 1257 to 1277, he was offered the throne from Mitso Asen. He led the Bulgarian Empire at a time when the nearby Byzantine Empire disintegrated into rump states. To strengthen his position, he forged an alliance with one of the rump state—Nicaea—by marrying Irene, a daughter of Theodore II of the prominent Laskaris family.
The Second Bulgarian Empire was a medieval Bulgarian state that existed between 1185 and 1396. A successor to the First Bulgarian Empire, it reached the peak of its power under Tsars Kaloyan and Ivan Asen II before gradually being conquered by the Ottomans in the late 14th century.
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 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.
The Byzantine–Bulgarian wars were a series of conflicts fought between the Byzantines and Bulgarians which began when the Bulgars first settled in the Balkan peninsula in the 5th century, and intensified with the expansion of the Bulgarian Empire to the southwest after 680 AD. The Byzantines and Bulgarians continued to clash over the next century with variable success, until the Bulgarians, led by Krum, inflicted a series of crushing defeats on the Byzantines. After Krum died in 814, his son Omurtag negotiated a thirty-year peace treaty. Simeon I had multiple successful campaigns against the Byzantines during his rule from 893 to 927. His son Peter I negotiated another long-lasting peace treaty. His rule was followed by a period of decline of the Bulgarian state.
The Battle of Philippopolis or Battle of Plovdiv took place on 30 June 1208 in the surroundings of Philippopolis between the armies of the Bulgarian Empire and the Latin Empire. The Crusaders were victorious.
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.
Strez was a medieval, semi-independent Bulgarian sebastokrator. He was a member of the Asen dynasty and a cousin or a brother of Boril of Bulgaria. A major contender for the Bulgarian throne, Strez initially opposed the ascension of his close relative Tsar Boril. He fled to Serbia, where he accepted the vassalage of Grand Prince Stefan Nemanjić, and Serbian support helped him establish himself as a largely independent ruler in a large part of the region of Macedonia. However, Strez turned against his suzerains to become a Bulgarian vassal and joined forces with his former enemy Boril against the Latins and then Serbia. Strez died amidst a major anti-Serbian campaign under unclear circumstances, sometimes described as a Serbian plot.
Ivan Asen II, also known as John Asen II, was Emperor (Tsar) of Bulgaria from 1218 to 1241. He was still a child when his father Ivan Asen I – one of the founders of the Second Bulgarian Empire – was killed in 1196. His supporters tried to secure the throne for him after his uncle, Kaloyan, was murdered in 1207, but Kaloyan's other nephew, Boril, overcame them. Ivan Asen fled from Bulgaria and settled in the Rus' principalities.
Joachim III was the Patriarch of the Bulgarian Orthodox Church between c. 1282 and 1300, when the Second Bulgarian Empire reached its lowest point of decline during the reign of the emperors George Terter I, Smilets and Chaka. He was executed for treason by emperor Theodore Svetoslav in 1300. The Church did not recognize his guilt and his name was included in the list of Bulgarian Patriarchs in the Book of Boril. His seat was Tarnovo, the capital of Bulgaria.
