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From 1462 to 1493, Collioure was under French occupation during the reign of Louis XI. In 1642, after the Catalans had freed themselves from Spanish supremacy, Collioure fell again into French hands. During that period, Sébastien le Prestre de Vauban (1633-1707), a French officer who built fortresses under Louis XIV, altered the fortifications giving Collioure its current appearance. Through the Pyrenean Peace Treaty of 1659, the Roussillon definitively fell to the French crown.