William I of Sancerre (, ca. 1176 – 1217) was the second Count of Sancerre, Lord of Saint-Brisson and

La Ferté-Loupière La Ferté-Loupière () is a commune in the Yonne department in Bourgogne-Franche-Comté in north-central France. The village is famous for its danse macabre, dating back from the beginning of the 16th century, in the church of Saint-Germain. Se ...

from 1191 until his death. He was the eldest son of

Stephen I, Count of Sancerre Stephen I (1133–1190), Count of Sancerre (1151–1190), inherited Sancerre on his father's death. His elder brothers Henry I of Champagne, Henry Ι and Theobald V of Blois, Theobald V received Champagne and Blois. His holdings were the smallest ...

. In 1217 he accompanied his brother-in-law,

Peter II of Courtenay Peter II of Courtenay (; died 1219), was emperor of the Latin Empire of Constantinople from 1216 to 1217. Biography Peter II was a son of Peter I of Courtenay (died 1183), a younger son of Louis VI of France and his second wife, Adelaide of Mau ...

, who had just been elected

Latin Emperor The Latin Emperor was the ruler of the Latin Empire, the historiographical convention for the Crusader realm, established in Constantinople after the Fourth Crusade (1204) and lasting until the city was reconquered by the Byzantine Greeks in 12 ...

, on his journey to

Constantinople Constantinople (#Names of Constantinople, see other names) was a historical city located on the Bosporus that served as the capital of the Roman Empire, Roman, Byzantine Empire, Byzantine, Latin Empire, Latin, and Ottoman Empire, Ottoman empire ...

. Both were captured and imprisoned by the ruler of

Epirus Epirus () is a Region#Geographical regions, geographical and historical region, historical region in southeastern Europe, now shared between Greece and Albania. It lies between the Pindus Mountains and the Ionian Sea, stretching from the Bay ...

Theodore Komnenos Doukas Theodore Komnenos Doukas (, ''Theodōros Komnēnos Doukas;'' Latinized as Theodore Comnenus Ducas; died 1253) or Theodore Angelos Komnenos was the ruler of Epirus and Thessaly from 1215 to 1230 and of Thessalonica and most of Macedonia and we ...

, and died in prison. He was succeeded by his son,

Louis I Louis I may refer to: Cardinals * Louis I, Cardinal of Guise (1527–1578) Counts * Ludwig I, Count of Württemberg (c. 1098–1158) * Louis I of Blois (1172–1205) * Louis I of Flanders (1304–1346) * Louis I of Châtillon (died 13 ...

References

Sources

* 1170s births 1217 deaths 12th-century French nobility 13th-century French nobility Counts of Sancerre Christians of the Crusades French people who died in prison custody Prisoners and detainees of the Despotate of Epirus House of Blois {{France-noble-stub