Ayasofya Grand Mosque, known as Ayasofya-i Kebir Cami-i Şerifi is a masterpiece with its innovative architecture, rich history, religious significance and extraordinary characteristics as the largest Eastern Roman Church built. It was reopened as a museum in 1934 and served as a museum with no religious practice. Hagia Sophia was reopened to worship as Ayasofya Grand Mosque with the Presidential Decree in July 2020 and it serves as the world heritage of mankind as a whole.