Baldwin I was the first Emperor of the Latin Empire of Constantinople; Count of Flanders from 1194 to 1205 and Count of Hainaut from 1195 to 1205. Baldwin was one of the most prominent leaders of the Fourth Crusade, which resulted in the sack of Constantinople in 1204, 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.
Boniface I, usually known as Boniface of Montferrat, was the ninth Marquis of Montferrat, a leader of the Fourth Crusade (1201–04) and the king 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.
The Principality of Achaea or Principality of Morea was one of the vassal states of the Latin Empire, which replaced the Byzantine Empire after the capture of Constantinople during the Fourth Crusade. It became a vassal of the Kingdom of Thessalonica, along with the Duchy of Athens, until Thessalonica was captured by Theodore, the despot of Epirus, in 1224. After this, Achaea became for a while the dominant power in Greece.
Marco Sanudo was the creator and first Duke of the Duchy of the Archipelago, after the Fourth Crusade.
During the late Middle Ages, the two cities of Argos and Nauplia formed a lordship within the Frankish-ruled Morea in southern Greece.
Karystos or Carystus is a small coastal town on the Greek island of Euboea. It has about 5,000 inhabitants. It lies 129 km south of Chalkis. From Athens it is accessible by ferry via Marmari from the port of Rafina. After the Greek war of independence, its urban plan was laid out by the renowned Bavarian civil engineer Bierbach, in the middle of the 19th century.
The Battle of the Olive Grove of Kountouras took place in the summer of 1205, in Messenia in the Morea peninsula, between the Frankish Crusaders and the local Byzantine Greeks, resulting in a victory of the Franks and the collapse of the local resistance.
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.
Guy or Guido Pallavicini, called Marchesopoulo by his Greek subjects, was the first marquess of Bodonitsa in Frankish Greece from 1204 to his death in or shortly after 1237. He was one of the most important Frankish rulers in Greece, and played a major role in the short-lived Kingdom of Thessalonica: in 1208–1209 he supported the Lombard rebellion against King Demetrius of Montferrat, but by 1221 he was the kingdom's regent (bailli), and was left to defend the city against the ruler of Epirus, Theodore Komnenos Doukas. Left unsupported by the Latin Empire, and with a projected crusade to relieve the city delayed, he surrendered the city in December 1224. The belated arrival of the crusade helped to save his own fief from falling to the Epirotes, however, and he was soon able to return there, dying on or shortly after 1237.
Louis Fadrique a Catalan nobleman who was Count of Salona, as well as lord of various other towns in Central Greece from ca. 1365 until his death in 1382. In 1375–1381 he also served as the vicar-general of the twin duchy of Athens and Neopatras.
The Triarchy of Negroponte was a crusader state established on the island of Euboea after the partition of the Byzantine Empire following the Fourth Crusade. Partitioned into three baronies run by a few interrelated Lombard families, the island soon fell under the influence of the Republic of Venice. From circa 1390, the island became a regular Venetian colony as the Realm of Negroponte.
Boniface of Verona was a Lombard Crusader lord in Frankish Greece during the late 13th and early 14th century. A third son from a junior branch of his family, he sold his castle to equip himself as a knight, became a protégé of Guy II de la Roche, Duke of Athens, expelled the Byzantines from Euboea in 1296, and advanced to become one of the most powerful lords of Frankish Greece. Following Guy II's death, he served as regent for the Duchy of Athens in 1308–09, and was captured by the Catalan Company in the Battle of Halmyros in March 1311. The Catalans held Boniface in high regard, and offered to make him their leader. Boniface refused, but retained close relations with them, sharing their hostility towards the Republic of Venice and its own interests in Euboea. Boniface died in late 1317 or early 1318, leaving his son-in-law, the Catalan vicar-general Alfonso Fadrique, as the heir of his domains.
Ravano dalle Carceri was a Lombard nobleman. He was one of the first triarchs of Negroponte from 1205.
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 First Parliament of Ravennika was convened in May 1209 by Latin Emperor Henry of Flanders in the town of Ravennika in Central Greece in an attempt to resolve the rebellion of the Lombard barons of the Kingdom of Thessalonica.
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.
William IV of Saint Omer was the castellan of Saint-Omer from ca. 1171 until his death, as well as Lord of Beaurain and Fauquembergues.
