Arsaniou Monastery for old men was possibly founded during the 2nd Byzantine period (961-1204). It was founded by a monk named Arsenios, after whom it was named.
According to the most likely version of events, it was deserted at one point due to pirates causing problems to coastal hamlets and, like many other Cretan monasteries, it was renovated before 1600. The Church of Agios Georgios, the Catholicon of the Monastery, a cruciform domed basilica, was inaugurated during the late 16th century.
The great earthquake of 1856 destroyed a large part of the monastery and a decade later, the monks donated its property for the war of liberation of 1866. During the final Cretan revolution (1897-1898), Arsani suffered its own holocaust, with the Abbot Gabriel Klados meeting his doom after conflict with the Ottomans. This was the final contribution of the monastery shortly before the liberation of Crete.
The next landmark in the history of the monastery came in 1941, when the Germans executed monk Damianos Kallergis for fostering guerillas.
The monastery was renovated in the early 1970s, with the addition of murals to the church and the construction of the museum and conference center.
References:The Church of St Donatus name refers to Donatus of Zadar, who began construction on this church in the 9th century and ended it on the northeastern part of the Roman forum. It is the largest Pre-Romanesque building in Croatia.
The beginning of the building of the church was placed to the second half of the 8th century, and it is supposed to have been completed in the 9th century. The Zadar bishop and diplomat Donat (8th and 9th centuries) is credited with the building of the church. He led the representations of the Dalmatian cities to Constantinople and Charles the Great, which is why this church bears slight resemblance to Charlemagne's court chapels, especially the one in Aachen, and also to the Basilica of San Vitale in Ravenna. It belongs to the Pre-Romanesque architectural period.
The circular church, formerly domed, is 27 m high and is characterised by simplicity and technical primitivism.