After the Fourth Crusade the Kaisariani monastery is mentioned by Pope Innocent III. It seems, however, that it remained in Orthodox hands, while other churches and monasteries passed to Latin clergy.
During the period of Frankish rule a single-aisle church was built southwest of the monastery, which today is abandoned.
A letter of 1209 states that the production of the beehives was given to the abbot of the monastery. Four years later Michael Choniates complains that he received no income, and the abbot replies that the beehives were destroyed.
No verified source was found for Venetian rule on Hymettus, so we write nothing here.