The Frankish monastery at Isova was founded some time after 1205, when the French Principality of Achaea was created in southern Greece in the wake of the Fourth Crusade, and before 1263, when the abbey was destroyed by fire (see below).
After 1205, when the French Principality of Achaea was established in southern Greece following the Fourth Crusade, the Frankish monastery at Isova was founded. Before 1263, when the abbey was destroyed by fire (as mentioned below), it existed.