Church of Agios Georgios, Archaeological Site of Aigosthena, Porto Germeno, Municipality of Mandra-Eidyllia During the Byzantine and post-Byzantine period, the area of the acropolis of the Fortress of Aigosthena hosted the Monastery of Agios Georgios, from which the ruins of monks are preserved, as well as the katholikon, dedicated to Agios Georgios.
Monastery of Osios Meletios Kithaironos, Oinoi, Municipality of Mandra-Eidyllia The Monastery of Osios Meletios, one of the most important monastic complexes in the country, is located SE of Mount Pastra of Kithairon and is about 2.5 km east of the settlement of Oinoi. The history of the monastery is strongly connected with the action of Osios Meletios the Younger, who was the reformer of the ascetic life in Greece.