The reconversion of Hagia Sophia, a symbol of Istanbul and a marvel of Byzantine art, into a mosque is a historic moment. The controversial move, put in motion by President Recep Tayyip Erdogan's decree, could fairly be seen as the Turkish Reconquista.
Istanbul was Constantinopole in 1453 when it was conquered by the Muslim-Turkish Ottomans under Mehmed II, and the East Roman (Byzantine) Empire ceased to exist. Some 40 years later, Catholic monarchs Isabella I of Castile and Ferdinand II of Aragon conquered Granada, ending the only Muslim kingdom in Europe in what became known as the "Reconquista."