Nicolas de Joinville was a French knight who served as bailli of the Principality of Achaea for Prince John of Gravina from 1323, until the Prince's arrival in Achaea in January 1325. [1] He was the great-grandson of the chronicler Jean de Joinville. [2] Joinville was an able man, and was sent to Achaea as part of John of Gravina's preparations for an—ultimately unsuccessful—campaign against the Byzantine Empire. [3] [4]