Perili Köşk

Perili Köşk (literally, "haunted mansion" in Turkish; also known as the Yusuf Ziya Pasha Mansion) is a historical monument in Rumeli Hisari, Istanbul, Turkey. Built in 1911, the red brick mansion with stained glass windows is located considerably close to the Fatih Sultan Mehmet Bridge. The name Perili Köşk is roughly translated to "Haunted Mansion", due to a local reputation of bringing bad luck to its owners.

The mansion was first built in to accommodate Ottoman Grand Vizier Yusuf Ziya Paşa, at the time a respected member of the Turkish military, and his family while they were working in Istanbul. Perili Köşk has nine stories in total and is about 54,000sq feet (about 5,000sq metres). Perili Köşk was valued as the most valuable building in the Bosphorus at $65,000,000 USD, however there are different price tags on the monument. A Turkish newspaper, "Hürriyet" valued the mansion at $70,000,000 USD while another newspaper valued it at $60,000,000 USD.

The mansion was valued as one of the world's most valuable buildings because of its construction, area and views. Perili Köşk has incredible views of Istanbul from all floors, which add significantly to its already outstanding value.

The mansion was bought by Basri Erdoğan in 1991 and the renovation started in 1993. The renovation took about seven years, and was completed at 2000.