One of the most beautiful surviving Byzantine churches, with interiors laid out in fine mosaics and frescoes, has been converted into the impressive Kariye Museum.
This Istanbul City Center house of prayer is a good spot to kick off your day of sightseeing. There's plenty to experience in the vicinity, including Blue Mosque, Hagia Sophia, and Topkapi Palace. Wander around at your leisure at Chora Church before making tracks to these other fine attractions.