Unmissable as you stand on the busy Galata bridge and look up at the city's historic skyline is the mosque designed by the great Ottoman architect Sinan for Suleiman the Magnificent. Newly restored to its original splendour, it is generally regarded as the finest of the 42 surviving mosques he designed for Istanbul. Unusually, it retains much of the original complex of social service buildings that came attached to it, including several madrasahs, a hospital, a library and a hamam. Locals come here to eat kuru fasuliye, the Turkish take on baked beans, in a street once haunted by opium addicts.