The bailo and captain of Negroponte was the representative of the Republic of Venice stationed at Chalcis (Negroponte) on the island of Euboea. The bailo played an important role as the mediator between, and de facto overlord of, the triarchs of Euboea, who had their common residence in Negroponte. The triarchies were created by the division of the island between three rulers (triarchs) after its conquest following the Fourth Crusade (1204).
The Venetian title bailo (plural baili) derives from the Latin baiulus. In English, it may be translated bailiff, or otherwise rendered as bailey, baili, bailie, bailli or baillie.