Mihrimah Sultan Mosque is one of the most recognizable landmarks in Uskudar, designed by the renowned imperial architect Mimar Sinan. It was built between 1543-44 and 1548. Mihrimah Sultan commissioned the mosque, and it is the first of two Friday mosques in Istanbul. The mosque sits on an elevated platform with a wide double portico that contains an elegant marble ablution fountain. The architectural design of the mosque features various hallmarks of Mimar Sinan's mature style, including a spacious and high-vaulted basement, slender minarets, and a single-domed baldacchino flanked by three semi-domes ending in three exedrae.