National Museum of Contemporary History, State museum in Tivoli Park, Ljubljana, Slovenia

The National Museum of Contemporary History occupies the Cekin Mansion and displays artifacts, photographs, and documents related to Slovenia's recent past. The collection spreads across several rooms and presents materials that document the life and events of an entire century.

The museum traces its origin to the Scientific Institute of the Executive Committee of the Liberation Front, founded in 1944. In 1948 the institute split, and its museum branch moved into Cekin Mansion in 1951. It was renamed Museum of the People's Revolution in 1958, Museum of Recent History in 1994, and received its present name in 2001. In 2023 it merged with the Museum of Slovenian Independence.

The permanent exhibition "Slovenci v 20. stoletju" (Slovenians in the 20th Century) is arranged in six thematic sections, from World War I through the Kingdom of Serbs, Croats and Slovenes, World War II, the postwar years, socialist economic organisation in Yugoslavia, to Slovenia's declaration of independence. The museum's name changed with the state: Museum of the People's Revolution in 1958, Museum of Recent History in 1994, and Museum of Recent History of Slovenia in 2001.

The museum sits in Cekin Mansion inside Tivoli Park, a short walk from the park's main paths. The interior was rebuilt in 1991 by architect Jurij Kobe, with a communication tower added in the courtyard and the attic converted for use. The permanent exhibition "Slovenians in the 20th Century" is arranged in six thematic sections, so plan the visit around those rooms.

The permanent exhibition "Slovenes in the 20th Century" is arranged in six thematic sections, from World War I through the Kingdom of Serbs, Croats and Slovenes, World War II, the postwar years, the socialist economy of Yugoslavia and the 1991 independence declaration. The collections combine objects, archival and library material, fine art and photographs.