Callejeros Viajeros
One of the treasures of Topkapi
Inside Topkapi Palace is the Orthodox church of St. Irene, it's the only church that hasn't been turned into a mosque. It was founded in the VI century and was the first place of worship to be built in ancient Constantinople. It's 100x32 meters with a Roman style Basilica. In summer it holds concerts such as the Istanbul Music Festival. Admission is free.
