The Despotate of Epirus was one of the Greek successor states of the Byzantine Empire established in the aftermath of the Fourth Crusade in 1204 by a branch of the Angelos dynasty. It claimed to be the legitimate successor of the Byzantine Empire, along with the Empire of Nicaea and the Empire of Trebizond, its rulers briefly proclaiming themselves as Emperors in 1227–1242. The term "Despotate of Epirus" is, like "Byzantine Empire" itself, a modern historiographic convention and not a name in use at the time.
The Battle of Pelagonia or Battle of Kastoria took place in early summer or autumn 1259, between the Empire of Nicaea and an anti-Nicaean alliance comprising Despotate of Epirus, Kingdom of Sicily and the Principality of Achaea. It was a decisive event in the history of the Eastern Mediterranean, ensuring the eventual reconquest of Constantinople and the end of the Latin Empire in 1261.
William of Villehardouin was the fourth prince of Achaea in Frankish Greece, from 1246 to 1278. The younger son of Prince Geoffrey I, he held the Barony of Kalamata in fief during the reign of his elder brother Geoffrey II. William ruled Achaea as regent for his brother during Geoffrey's military campaigns against the Greeks of Nicaea, who were the principal enemies of his overlord, the Latin Emperor of Constantinople Baldwin II. William succeeded his childless brother in the summer of 1246. Conflicts between Nicaea and Epirus enabled him to complete the conquest of the Morea in about three years. He captured Monemvasia and built three new fortresses, forcing two previously autonomous tribes, the Tzakones and Melingoi, into submission. He participated in the unsuccessful Egyptian crusade of Louis IX of France, who rewarded him with the right to issue currency in the style of French royal coins.
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.
William I of Champlitte (1160s-1209) was a French knight who joined the Fourth Crusade and became the first prince of Achaea (1205–1209).
Geoffrey I of Villehardouin was a French knight from the County of Champagne who joined the Fourth Crusade. He participated in the conquest of the Peloponnese and became the second prince of Achaea.
Nicholas Orsini was a Greek–Italian nobleman who was count palatine of Cephalonia from 1317 to 1323 and ruler of southern Epirus around Arta from 1318 to 1323. The son of Count John I Orsini and Maria, an Epirote princess, he succeeded his father upon the latter's death, and in the next year murdered his uncle, Thomas Komnenos Doukas, and usurped his rule of Epirus. While able to secure his control over southern Epirus, however, the north with the city of Ioannina were taken over by the Byzantine Empire. Nicholas' attempts to ally with the Republic of Venice and recover Ioannina failed, and he was in turn killed by his brother John II Orsini in 1323.
Othon de la Roche, also Otho de la Roche, was a Burgundian nobleman of the De la Roche family from La Roche-sur-l'Ognon. He joined the Fourth Crusade and became the first Frankish Lord of Athens in 1204. In addition to Athens, he acquired Thebes by around 1211.
Nicholas III of Saint-Omer was one of the most powerful and influential lords of Frankish Greece. He was hereditary Marshal of the Principality of Achaea, lord of one third of Akova and of one half of Thebes. He also served on three occasions as bailli of the Principality of Achaea.
The War of the Euboeote Succession was fought in 1256–1258 between the Prince of Achaea, William of Villehardouin, and a broad coalition of other rulers from throughout Frankish Greece who felt threatened by William's aspirations. The war was sparked by Villehardouin's intervention in a succession dispute over the northern third of the island of Euboea, which was resisted by the local Lombard barons with the aid of the Republic of Venice. The Lord of Athens and Thebes, Guy I de la Roche, also entered the war against William, along with other barons of Central Greece. Their defeat at the Battle of Karydi in May/June 1258 effectively brought the war to an end in an Achaean victory, although a definite peace treaty was not concluded until 1262.
Autremencourt is a commune in the department of Aisne in the Hauts-de-France region of northern France.
The Lordship of Salona, after 1318 the County of Salona, was a Crusader state established after the Fourth Crusade (1204) in Central Greece, around the town of Salona.
Thomas III d'Autremencourt or de Stromoncourt was the fourth Lord of Salona in Central Greece, and the last of his family. He ruled his domain from 1294 until his death in the Battle of the Cephissus against the Catalan Company in 1311. At the same time, he also held the position of marshal of the Principality of Achaea. After his death, his widow and domain passed to Roger Deslaur, who in the aftermath of Cephissus was for a brief time (1311–1312) selected as the leader of the Catalan Company.
Richard Orsini was the count palatine of Cephalonia and Zakynthos from before 1260 to his death in 1303/4, and also Count of Gravina in 1284–91. He also served on behalf of the Angevin Kingdom of Naples as captain-general of Corfu in 1286–90 and as the bailli in the Principality of Achaea from 1297 to 1300. He assisted the Despot of Epirus in battle against the Byzantine Empire, and secured the marriage of his son, John I, to the Epirote ruler's daughter, which would lead in 1318 to the Orsini takeover of Epirus.
John I Orsini was the count palatine of Cephalonia and Zakynthos from 1303 or 1304 to his death in 1317. Married to an Epirote princess, John spent a decade at the Epirote court before succeeding his father, Richard Orsini, as count palatine. As a vassal of the Principality of Achaea, he was involved in its domestic affairs and especially the dynastic dispute between the infante Ferdinand of Majorca and Princess Matilda of Hainaut in 1315–16, and participated in a number of Latin campaigns against Epirus, which he aspired to rule. A year after his death, his son and heir Nicholas Orsini seized Epirus and brought it under the Orsini family's rule.
Geoffrey of Briel, in older literature Geoffrey of Bruyères, was a French knight and the third lord of the Barony of Karytaina in the Principality of Achaea, in Frankish Greece. He led a colourful and turbulent life, narrated in detail in the Chronicle of the Morea. Accounted the finest knight in the Principality, he fought in the wars against the Byzantine Greeks, was captured in the Battle of Pelagonia in 1259, and was sent back to Achaea bearing the Byzantine terms in 1261. Geoffrey was twice deprived of his barony, once for rebelling against his uncle, the Prince of Achaea William II of Villehardouin, and then for abandoning the Principality without leave in order to spend time with a mistress, the wife of one of his feudatories, in Italy. He was pardoned both times, but henceforth held his title as a gift of the Prince. He died childless in 1275, and the Barony of Karytaina was split up.
Thomas II d'Autremencourt, commonly misspelled de Stromoncourt, was the second Lord of Salona in Central Greece from 1215 to 1258 and vassal of the Principality of Achaea. He was the son of Thomas I d'Autremencourt, the first Lord of Salona. In 1215 he reconquered Salona from the Despotate of Epirus and recovered the fief of his father. In 1258, he became involved in the War of the Euboeote Succession, siding with Guy de la Roche and the Frankish lords who opposed the hegemonic ambitions of the Prince of Achaea, William II of Villehardouin. William however prevailed in the Battle of Karydi in 1258, and a parliament was assembled at Nikli to judge the defeated lords, and again expressed his loyalty to the prince of Achaea. Thomas died in the same year and was succeeded by his son William.
William d'Autremencourt was a Lord of Salona from 1258 to 1294.
Nicholas I of Saint Omer was a French knight who in the aftermath of the Fourth Crusade became a lord in the Frankish Duchy of Athens.
The Second Parliament of Ravennika was convened in May 1210 by Latin Emperor Henry of Flanders in the town of Ravennika in Central Greece in order to resolve the differences between the princes of Frankish Greece and the Roman Catholic clergy of their domains.
