Church of Panagia Protothronos

The Church of Panagia Protothronos (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 the episcopal throne in the semi-circular sanctuary conch survive. In middle Byzantine times the building was converted into a transitional cross-in-square church. A domed narthex was later added, flanked by the chapel of Saint Akindynos to the north and a vaulted rectangular room to the south.

According to an architrave inscription probably from the templon, the church was renovated in 1052. The inscription also mentions the names of Bishop Leo, Niketas, "protospatharios and tourmarches of Naxia" and Count Stephen Kamilaris. Other 16th and 17th-century inscriptions refer to subsequent repairs. The church interior is decorated in five successive layers dating to the early Christian period; the 9th century (non-figurative decoration); and the 10th, 11th, and 13th centuries. Some of these were detached and then repositioned once the earliest layer had been removed, so frescoes from different periods are now visible.

The first layer of frescoes dates to the 7th century - apostles adorn the bottom of the conch, while the side of the window has a depiction of St. Isidore. The second layer painted over the Apostles in the conch consisted of non-figurative decoration, with crosses in the arcades, and dates to the Iconoclast period in the 9th century.

The two superimposed layers uncovered in the dome have been dated to 1052 and 1056 respectively, as they have been linked to the architrave inscription and a further inscription in the north chapel, commemorating the Assumption of the Servant of God Anna in 1056. All the same, it is also believed that the first layer detached from the dome, along with other wall paintings in the south antenna, date to a slightly earlier period, in the 10th and 11th century. The depictions of Saints George, Nicholas, Dimitrios and Theodore incorporated in the eastern section of the second layer date to 1052.

According to another view, the depiction of the Annunciation on the south wall of the sanctuary is later, dating to the 11th or 12th-13th century. In the late 13th century the lower part of the sanctuary conch was re-decorated with co-officiating bishops, only one of whom has survived in detached form. The Supplication depicted in the apse was painted later.