The Daphni Monastery fell into decline after it was sacked by Frankish crusaders in 1205. The region became part of the Duchy of Athens under Othon de la Roche. Othon gave the Daphni Monastery to the Cistercian Abbey of Bellevaux, who added their own cloister and twin pointed arches in the Gothic style to the façade of the church. The Daphni Monastery became a popular burial place for Knights. In 1458, immediately after the coming of the Turks and the visit of Sultan Mehmed II to Athens, the Cistercians abandoned the Daphni Monastery and the Duchy of Athens was abolished.