During the late Middle Ages, the town was the centre of the Barony of Kalavryta within the Frankish Principality of Achaea, until it was reconquered by the Byzantines in the 1270s. After that it remained under Byzantine control until the fall of the Despotate of the Morea to the Ottoman Turks in 1460. With the exception of a 30-year interlude of Venetian control, the town remained under Turkish rule until the outbreak of the Greek War of Independence in 1821, in whose early stages Kalavryta figures prominently: it was here that on 21 March 1821 the flag of the revolt was raised at the monastery of Agia Lavra by bishop Germanos III of Old Patras.