Location: on the road from Halki village to the village of Moni, in central Naxos

Description: the church, which dates back to the 6th century, constitutes one of the more significant monuments on the island, because it contains rare frescoes of early Byzantine art (6th - 7th century). The temple was probably built in three phases. Initially, the church had a type of three-cornered type of structure, a fact that leads to the conclusion that it was perhaps built as a mausoleum. In the ensuing years the western side of the temple was extended, while three chapels of the same form resulted in the extension of the church to the north.

One observes successive layers of frescoes in the adornment of the church, more particularly in the mural of Panagia Nikopio, where the Virgin Mary is depicted holding a disc within which one can discern the image of Christ. The face of the Madonna stands out due to its subtle idealized beauty, as the church was once a Catholic monastery. According to the experts, the said church is one of the most important churches that exist on the Balkan Peninsula.