Hosting genuine exhibitions and cultural activities since 2007 in the frame of its vigorous museum studies, Rezan Has Museum has become a museum site connecting the past to the future with its Ottoman hammam structure dated back to 17th century and Byzantine cistern to 11th century.

The museum possesses actually no collections, however, provides space for exhibitions within the Kadir Has University's building, a European Union Prize for Cultural Heritage winning redevelopment from the historical "Cibali Tabacco Factory".[1][2]
. The museum consists of a cistern dating back to 11th century, called "Karanlık çeÅŸme" (literally: "The Dark Fountain"), which is one of the few Byzantian structures outside of the Walls of Constantinople along Golden Horn. Another important part of the museum is a hamam ruin from the 17th century of the Ottoman era, which is situated at the top of the cistern.