Kılıç Ali Pasha Mosque is a deliberate miniature of Hagia Sophia, built to the scale of a single congregation. A broad central dome is braced by two half-domes along the prayer axis, and standing beneath it you can read the whole plan at once, which the huge church it copies never allows. Light pools under the dome and İznik tiles glow blue and coral around the mihrab. The room feels intimate rather than imperial. Around it stand a bathhouse, a school, a fountain and the admiral's tomb.
Mimar Sinan designed it around 1580, when he was about ninety, for Kılıç Ali Pasha, grand admiral of the Ottoman fleet. The mosque stands on ground that did not exist before it: the admiral filled in shallow water at Tophane and built on the land he had made. The old cannon-foundry quarter around it is a lively waterfront now, with cruise liners mooring along the shore the mosque once faced. Its hammam again fills with steam, one of the few Sinan bathhouses where you can still bathe.