Athonite tradition attributes the foundation of the monastery to the Byzantine Emperor Theodosius II and his sister St. Pulcheria during the 5th century; the remains of this early monastery, having been subsequently destroyed by a huge rock that fell from the nearby hills, can still be found 500 metres from the existing monastery. However, historical and archaeological evidence cannot safely confirm this tradition and, therefore, the precise time of the monastery's foundation, as well as its founders, cannot be positively identified.