Turkish President Recep Tayyip Erdogan has declared the World Cultural Heritage Hagia Sophia a mosque. Erdogan’s decision has caused considerable outrage in the neighbouring country Greece and the Christian community. A Turkish court on Friday announced that the decision to make the historic building a museum in 1934 was illegal. While delivering its verdict, the court said that the 'Hagia Sophia' established in the sixth century is registered as a mosque in all the available documents of the land.