Old Darülfünun building (Turkish: Eski Darülfünun Binası) was a university building constructed next to Haghia Sophia in Istanbul, Ottoman Empire in the mid-19th century.

It was a three-storey building in neo-Renaissance style that had a great visual impact on Istanbul's urban character.

The building's designer was Swiss architect Gaspare Fossati (1809—1883), who was also responsible for extensive restoration of Hagia Sophia.

Later it was also used by the Ottoman Parliament, and finally served as Palace of Justice.

[2] This article about a Turkish building or structure is a stub.