Examples of Ottoman Turkish architecture are located in the Old Bazaar. Mosques in Skopje are usually simple in design, with a square base and a single dome and minaret. There entrance is usually emphasized by a portico, as on Mustafa Pasha Mosque, dating from the 15th century. Some mosques show some originality in their appearance: Sultan Murad and Yahya Pasha mosques have lost their dome and have a pyramidal roof, while Isa Bey mosque has a rectangular base, two domes and two side wings. The Aladža Mosque was originally covered with blue faience, but it disappeared in the 1689 Great Fire. However, some tiles are still visible on the adjoining türbe. Other Turkish public monuments include the 16th-century clock tower, a bedesten, three caravanserais, two Turkish baths and the Stone Bridge, first mentioned in 1469.