Nestled in the middle of the busy Tahtakale shopping district, this diminutive mosque is a gem. Dating from 1560, it was designed by Sinan for Rüstem Paşa, son-in-law and grand vizier of Süleyman the Magnificent. A showpiece of the best Ottoman architecture and tile work, it is thought to have been the prototype for Sinan's greatest work, the Selimiye Camii in Edirne. At the time of research restoration works were underway and the mosque was closed to the public.

　　The mosque is easy to miss because it's not at street level. There's a set of access stairs on Hasırcılar Caddesi and another on the small street that runs right (north) off Hasırcılar Caddesi towards the Golden Horn. At the top of the stairs, there's a terrace and the mosque's colonnaded porch. Exquisite panels of İznik tiles are set into the mosque's facade. The interior is covered in more tiles and features a lovely dome, supported by four tiled pillars.

　　The preponderance of tiles was Rüstem Paşa's way of signalling his wealth and influence, with İznik tiles being particularly expensive and desirable. It may not have assisted his passage into the higher realm though, because by all accounts he was a loathsome character. His contemporaries dubbed him Kehle-i-Ikbal (the Louse of Fortune) because he was found to be infected with lice on the eve of his marriage to Mihrimah, Süleyman's favourite daughter. He is best remembered for plotting with Roxelana to turn Süleyman against his favourite son, Mustafa. They were successful and Mustafa was strangled in 1553 on his father's orders.