Completed in 1862 after 20 years of construction (the first stone was laid by King Otto and Queen Amalia), this large three-aisled domed basilica was consecrated to the Annunciation of the Virgin Mary. Inside are the tombs of two Orthodox saints. In its pleasant courtyard there are the statues of the last Byzantine Emperor (Saint Constantine XI ‘the Martyr’) and a former Archbishop of Athens. It is currently undergoing restoration, so large parts are not visible under the scaffolding.