The National Museum of Photography got its name in 1996, and when The Black Diamond was completed in 1999 the museum moved into the present exhibitions rooms. The museum is in fact somewhat older. It is based on the part of the collection of the Department of Maps, Pictures and Photographs that was previously called the Photo Historical Sheets  pictures which because of either their artistic value or their photo historical importance differed from the Picture Collection's otherwise predominantly documentary culture-historical pictures.