The Barony of Vostitsa was established ca. 1209, after the conquest of the Peloponnese by the Crusaders, and was one of the original twelve secular baronies within the Principality of Achaea. The barony, with eight knight's fiefs attached to it, was given to Hugh I of Charpigny. The origin and name of the family is unclear, due to the differing attestations of his name in the main source, the various versions of the Chronicle of the Morea. The Greek version gives his surname as "de Lele", which has been commonly interpreted as being a corruption of "de Lille", and claims that he adopted the surname "de Charpigny" afterwards; while the Aragonese version of the Chronicle mentions that the first baron was Guy, that Hugh was his son, named "Cherpini" after the Greek village where he was born, and "Lello" was the name of a fortress constructed on the family's domains in Laconia ; to further complicate matters, the toponym "Charpigny" is not attested in contemporary France. With the establishment of the Byzantine province of Mystras in the 1260s, and the subsequent wars that saw much of the Peloponnese overrun by the Byzantine Greeks, by ca. 1320 Vostitsa, along with Chalandritsa and Patras, were the only surviving out of the twelve original baronies to be still in Latin hands. The Charpignys held the barony until the early 14th century, when the direct male line became extinct. The Prince of Achaea, Louis of Burgundy, married the heiress of the barony to Dreux of Charny, who also received the barony of the de Nivelet family. The family history of the Charpigny-Charny clan between 1316 and 1356 is obscure. Dreux's brother, Geoffrey, is attested, but he does not seem to have inherited any lands. However, in 1327 a lady Agnes, daughter of a certain Geoffrey de Charpigny, is mentioned as entering possession of her "maternal heritage", and it was Guillemette of Charny, the daughter of Geoffrey de Charny, who succeeded the two baronies along with her husband, Philip of Jonvelle. Various suggestions have been made to simplify the family tree, such as Agnes being the unnamed wife of Dreux of Charny, with Guillemette as her sister. According to Raymond-Joseph Loenertz, these genealogical problems have been created by some lapsus in Du Cange's work Histoire de l’Empire de Constantinople sous les empereurs français, complicated by Hopf's habit to present his own hypotheses as facts. Agnes of Charpigny, daughter and heiress of Hugues II of Charpigny, would then have been the wife of Dreux of Charny, and the mother of his daughter Guillemette, Philipp of Jonvelle's wife. In 1359, the rights to both baronies were purchased from Guillemette and Philip by Marie of Bourbon, who sold them on to Nerio I Acciaioli in 1363. The barony was seized by the Navarrese Company ca. 1380, and held thereafter. By 1391 it was in the hands of Pedro de San Superano, who became Prince of Achaea in 1395. Vostitza now became part of the princely domain, and on San Superano's death passed to the new princely line, the Zaccaria, until 1428, when it was lost to the Greek Despot of the Morea, Theodore II Palaiologos, who passed it on to his brother, Constantine.
