The Sadberk Hanım Museum () is a private museum located at the Bosporus in Büyükdere quarter of Sarıyer district in Istanbul, Turkey, which was established by the Vehbi Koç Foundation in memory of Vehbi Koç’s deceased wife Sadberk. The museum is open every day except Wednesdays.BuildingsThe museum occupies two separate buildings of charming 19th century wooden villas. The original building is a three-story plus an attic wooden mansion and whose architecture was inspired by European vernacular traditions. The building, constructed of wood and lathe-and-plaster on a masonry foundation, was known as the "Azeryan Yalısı".The building was purchased by the Koç family in 1950, and was used by them as a summerhouse until the decision to convert it into a museum was taken in 1978. The conversion into a museum was carried out between 1978 and 1980 according to a restoration project that had been prepared by Sedat Hakkı Eldem. It opened its doors to the public on October 14, 1980 with the Sadberk Koç collection on display.The Azeryan Yalı occupies 400m2 of space set in grounds measuring a total of 4280m2 in all. On the ground floor is a gift shop and a small tea room. The ceiling over the main entrance, which is no longer used, is decorated with plaster moldings inspired by ancient Roman architecture. Wooden stairways lead to the upper floors. The walls are painted so as to resemble veined marble. The centrally located main halls of the second and third floors and the rooms opening onto them are used for display purposes. The attic is used for storage and also contains offices and a library. The crossed wooden moldings decorating the exterior give the building a distinctive appearance quite different from that of its neighbors. It is because of these molded facades that the building was for a long time popularly known as the "Threaded Yalı".
