Andromonastiro is perhaps the most important monastery complex of Messinia, both in architectural and monastic terms and it is one of the most beautiful in the Peloponnese.
It is located near the village Petralona, 5 km away from Ancient Messini. Andromonastiro is built in the 13th century and was built by the Byzantine Emperor Andronicus II Paleologos in order to commemorate the Patriarch of Constantinople Athanasios I who came from Androussa.
Andromonastiro is characterized by highly fortified elements and consists of the catholic monastery, a three-story tower, a two-storey wing and a two-storey building, where we can see the passageway at the main entrance to the monastery, an underground tank and other secondary buildings.
The Catholic Church in Andromonastiro is dedicated to the Transfiguration of the Savior, while there are two chapels, right and left, dedicated to Saint Georgios and Saint Catherina. There are still some parts from the hagiography of the temple.
The cistern (water source and reservoir) still exists beneath the holy altar. Androussa takes water from there since the Turkish rule till today.
In Andromonastiro there is also the church of Saint Lazarus which is the cemetery church of the convent, 100 meters away from the complex.
Andromonastiro since 1786 until 1929 was a dependency of the Holy Monastery of Sina in Egypt while since 1962 it is dependency of the monastery of Voulkano and since then it has not any monks.
Every year on August 6th when we honor the Transfiguration, hundreds of believers are gathered in Andromonastiro.