Hagia Irene / (Holy Peace)
Its architect unknown, this Byzantine basilica dates from the C6th, although its predecessor was commissioned by Emperor Constantine I — along with Hagia Sofia (Holy Wisdom) — in the C4th. It was the first place of Christian worship in Constantinople. Ironically, after the Ottoman invasion the church was used for a time as an arsenal, although it was never converted to a mosque. Istanbul, Turkey.
