Visited with a guest on 25th of Oct. 2018. It is o...

Visited with a guest on 25th of Oct. 2018. It is of great historical importance not because it's a "big church" but for two other reasons. 1. It was built in 4th century and it is the earliest of churches at that size and technology 2. It hosted both Christian and Muslim religion followers for 6 centuries. The cues are long and the lighting inside is a bit poor. Do not miss it if you are in Istanbul.