Church of the Holy Apostles

The Church of the Holy Apostles (Greek: Ἅγιοι Ἀπόστολοι, Agioi Apostoloi; Turkish: Havariyyun Kilisesi), also known as the Imperial Polyandrion (imperial cemetery), was a Byzantine Eastern Orthodox church in Constantinople, capital of the Eastern Roman Empire. The first structure dated to the 4th century, though future emperors would add to and improve upon it.