Hagia Sophia: A planet-well-known previous Byzantine church and Ottoman mosque, now a museum, noted for its spectacular architecture and historic importance.This overview is the subjective opinion of the Tripadvisor member instead of of Tripadvisor LLC. Tripadvisor performs checks on reviews as A part of our marketplace-leading believe in & securit

Constructed during the early 17th century, Istanbul's most photogenic building gets its nickname from the blue tiles adorning the interior.Since then, mosaics were added throughout the Byzantine period, structural modifications were made in both the Byzantine and Ottoman periods, and features important to the Islamic architectural tradition were co