Hagia Irene Museum

It's a bit old and for most people they would wonder what is there. Not very many descriptions and even the lighting is poor. However it is important for the Christian faith bc it's where the doctrine of the Trinity was discussed and where the Nicene creed was written

Poor Hagia Irene never gets the attention accorded to her sister church, Hagia Sophia. It was built during the Byzantine Golden Age so it's just as old. The Turkish government doesn't help matters by closing the church to the public. If you find yourself walking through the main courtyard of Topkapi Palace, spare a moment to check out Hagia Irene.

The city's most ancient church is in Istanbul, but it is a little expensive and a little expensive.