Named after the wife of the late Vehbi Koç, founder of Turkey’s foremost commercial empire, this museum is housed in two late 19th-century yalıs and is a showcase of both Turkish-Islamic artefacts collected by Mrs Koç and antiquities from the noted Hüseyin Kocabaş collection. Objects include İznik and Kütahya ceramics, Ottoman silk textiles and needlework, and an exquisite collection of diadems from the Mycenaean, Archaic and Classical periods. Labels are in English and Turkish. There's an excellent gift shop.
To get here, alight from the ferry at Sariyer and walk south from the ferry dock for approximately 10 minutes.