This mosque was built by Sultan Ahmet I during 1609-1616 in the square carrying his name in İstanbul. The architect is Sedefhar Mehmet Ağa. It is the only mosque in Turkey with six minarets. The mosque is 64 x 72 m in dimensions. The central dome is 43 m in height and is 33.4 m in diameter. 260 windows surround the mosque. Due to its beautiful blue, green and white tilings it has been named the "Blue Mosque" by Europeans. The inscriptions were made by Seyyid Kasım Gubari.