The
Treaty of Tarascon was an accord between
Pope Nicholas IV,
Philip IV of France,
Charles II of Naples, and
Alfonso III of Aragón that was intended to end the
Aragonese Crusade, an episode in the
War of the Sicilian Vespers. The treaty was signed at
Tarascon, halfway between papal
Avignon and
Arles, on 19 February 1291, six years after Philip's uncle,
Charles of Valois, tried to conquer Aragón from Alfonso's father,
Peter III of Aragon, in an event called the Aragonese "Crusade" because it was sanctioned by Nicholas' predecessor,
Pope Martin IV. The intent of the signatories in putting an end to hostilities was to prevent Aragonese domination of
Sicily, then ruled by Alfonso's brother,
James II.