Τhe Church of Panagia Protothronos (Greek: Παναγία Πρωτόθρονος, "Panagia of the First Throne") is located in the village of Halki in Tragaia, in the interior of Naxos island in Greece. The church is dedicated to the Annunciation, and was probably an early Christian basilica, of which only the synthronon and…