Chania Cathedral, better known as the Cathedral of the Three Martyrs - one of the main temples of the island of Crete. The cathedral is located in the historic center of the city of Chania, east of Halidon street, on Mitropoleos Square (Athenagoras Square), close to the Venetian harbor.

During the period of Venetian rule on the site of the Cathedral of the Three Martyrs there is another temple - the Church of Our Lady, which was supposedly built in the 14th century. After in 1645 the Turks captured Chania, Church of Our Lady turned into a soap factory. However, the main relic of the temple icon of the Mother of God for a long time kept in the storage room.

In the 19th century the factory belonged to the family of Mustafa Pasha Giritli Niley (Governor of Crete and later the Grand Vizier of the Ottoman Empire) .  According to local legend, one of the factory workers had a vision in which the Virgin Mary appeared to him and asked to pick up the icon and save it .  The man did not dare to disobey, and thus left the walls of the temple icon .  Some time later the son of Mustafa Pasha, fell into the well behind the church, and a devout Muslim, being in despair, turned in prayer to the Virgin Mary to rescue child .  In exchange Mustafa vowed to return Christians to their temple .  The child miraculously rescued, and the factory together with the land was transferred to the Christian community of Chania for the construction of a new church .  Construction of the cathedral of the Three Martyrs completed in the early 1860s .  The icon of the Virgin was returned to the temple .  With the financial support of the Russian Emperor Nicholas II in the late 19th century, the cathedral was carried out repair work and cast a new bell .

Today, the cathedral of the Three Martyrs is a three-nave basilica in neo-classical style with a tall bell tower on the north-western side of the temple. In the design of the facade used sculptured pseudo-pillars, cornices and arched openings. The interior of the cathedral is decorated with works by famous Greek artists. On the cathedral square is a monument to the Ecumenical Patriarch Athenagoras.