The Monastery of Panagia Prousiotissa (the Virgin Mary of Prousos) is dedicated to the Dormition of the Virgin and is one of the most important religious locations in Greece. According to tradition, the icon (PiP1) was painted by St. Luke the Evangelist in Prousa (nowadays Turkish Bursa) during the reign of the iconoclast emperor Theophilus. It was taken away from there to be saved from the burning of the icons the emperor had ordered. The icon was brought to Greece by a young man of noble origin, called Dionysios, but for an unknown reason the icon was lost when Dionysios arrived in Thrace.

This holy site dates back to 829AD and is linked to the adventures and the appearance of the holy icon in a cave of this area. The monastery was founded at the exact place which the Virgin Mary chose in a miraculous way. The miraculous icon of Panagia Proutiotissa is now kept in a carved cave church, the first church of the monastery. The katholikon is a cross-shaped temple with a dome. It dates back to 1754 and is also decorated with murals.

The icon was found on the 23rd of August which is also the date that the church celebrates. Monastery of Prousos is attracting many faithful each year, who come here to venerate the famous and miraculous icon of the Virgin Mary.