Hagia Sophia (Ayasofya)

Sultan Ahmet, Ayasofya Meydanı No:1, 34122 Fatih/İstanbul, Turkey

Built in 532 as the world’s largest place of worship, the Hagia Sophia (Ayasofya) shifts its identity with the times but never loses its grandeur. Converted from a church to a mosque during the Ottoman era and becoming a museum in 1935, the pink-hued Old City building is one of Istanbul’s don’t-miss attractions.