The impressive Church dedicated to Saint John the Theologian and the Holy Trinity is located north of Pantanassa village. The church is a two-room vaulted church and was built in 1645 by the priest Manolis Vlastos. On the facade, you can see the two entrances with Gothic elements in the windows and a row of glazed panels above the north gate. Also, a stone two-lobed belfry is preserved in fragments in the upper part of the western wall.

Inside the church there is an above-ground tomb (arkosolium) of the Venetian period.