Very close to the main entrance, the Church of the Transfiguration of the Savior rises up to recount the long troubled history of both the church and the castle. It is a square-planted temple enclosed on three sides by a courtyard. Around the temple one can enjoy the natural beauty of the landscape full of pine trees and roses, while the walls of the castle, give an impressive sense sending you back in time!
Originally the temple was an Ottoman mosque built along with Niokastro by the Turks. In 1686 the Venetian, Francis Morosini transformed the mosque into a Christian church of the Savior of Christ, when he captured the castle. In 1715 the Turks recaptured Niokastro with Koroni, and the temple became a mosque again. The church had a Christian rebirth for as many days as the Russians held Niokastro. It was again rebuilt in 1821 when the Greeks took the castle from the Turks, the mosque for a third time became an orthodox church.