Ademar lo Negre ("Adhemar the Black")[1] was a troubadour from Languedoc in the early thirteenth century (fl. 1210 - 1219). He was originally from Château-Vieux (Castelveill), which was under the jurisdiction of the Trencavel lords of Albi at the time. He was patronised by Peter II of Aragon and Raymond VI of Toulouse and even spent some time at the court of Ferdinand III of Castile. Four cansos of his survive.