Fifth-century basilica, discovered in 1937 at the Second Courtyard of Topkapı Palace in Istanbul. The name of the church is unknown but the ground plan is clear. It was three-naved basilica with semicirular apse.
See: 1. https://muze.gen.tr/muze-detay/topkapi
2.Topkapi Sarayi Bazilikasi-http://tayproject.org/TAYBizansMar.fm$Retrieve?YerlesmeNo=20393&html=bizansdetaile.html&layout=web