 It is also known as the Church of the Councils because two councils of importance to the history of Early Christianity are assumed to have been held within.The church is located in the south stoa of the Olympieion (Temple of Hadrian Olympios) next to the harbor of Ephesus.The church is dated to the early 5th century, coinciding with the Council of Ephesus, the third Ecumenical council in 431, suggesting that it may have been built specifically for that Third Ecumenical Council, during which the title of Theotokos for the Mother of God was declared othodox.