Agia Triada Monastery, Orthodox monastery in Chania Municipality, Greece

Agia Triada Monastery is a Greek Orthodox complex on the Akrotiri peninsula, built in the Byzantine cruciform style with three domes. The main church, dedicated to the Holy Trinity, is flanked by two smaller domed chapels, one dedicated to the Life-Giving Spring and the other to Saint John the Theologian. A narthex sits at the front at right angles to the main aisle, and the facade carries double columns of Ionian and Corinthian style with a Greek inscription dated 1631.

The monastery was built in the 17th century by two brothers of the Venetian Zangaroli family on the site of an earlier church. The cellar door carries the date 1613, and a Greek inscription on the church facade is dated 1631. From 1833 it served as a theological school, its belfry dates from 1864, and it was badly damaged in conflicts with the Turks before a seminary was set up in 1892.

The monastery's museum holds a portable icon of St John the Theologian from around 1500, Emmanuel Skordiles' 17th-century Last Judgment, and a manuscript roll with the mass of St Basil. Its library keeps rare books and a collection of codices. Monks still make and sell wine and olive oil on the premises.

The monastery is open daily to visitors and provides insight into monastic life on the grounds. Monks produce and sell olive oil and wine that visitors can purchase to support the community's operations.

The monastery's cellar door carries a date of 1613, earlier than the 1631 Greek inscription on the church facade, and the belfry is dated 1864. Inside, the museum holds a portable icon of St John the Theologian from around 1500 and a parchment roll manuscript with the mass of St Basil.