In Porto Germeno, inside the ancient bailey of Aigosthena, someone could find the ruins of the old-christian basilica, which is built in the early 6th century, with mosaic floor at its narthex and at its middle aisle. The south aisle was connected to the baptism place, in the center of which there was a built font. During the middle-Byzantine period (9th – 13th century) there was built – mainly with ancient material of second use – an elegant little church sacred to Virgin Mary, on the southest of the arch of the ruined basilica. The monument has some inscriptions, as, for example, the sacred phrase ‘’ πόλεως Αιγοσθενειτών ‘’ to the son of Great Konstantinos, who is Flavios Klavdios Konstantinos, which was found to the northeast corner. Due to the left ruins, of the surrounding space, speculations are made for the existence of a church. Some coins, also, have been found, hich seem to belong Konstantinos the 8th The Gladiator and to Manuil the 1st The Komninos, which leads us to the safe conclusion that the church ‘’was active’’ in the 11th and 12th century.