HAGIA SOPHIA MUSEUM (Places) - Hagia Sophia is the one of the most visited museums and most prominent monuments in the world in terms of the art and history of architecture. It has been called the eighth wonder of the world by East Roman Philon as far back as the 6th century. It was used as a church for 916 years, but following the conquest of Istanbul, the Hagia Sophia was converted into a mosque. It was used as a mosque for 482 years, and then converted to a museum in 1935. (Photo and caption by Melih Sular/National Geographic Photo Contest) #