The Long Night of Museums or the Night of Museums is a cultural event organized together by multiple museums and cultural institutions in a location during which the establishments remain open late into the night. Marketed together, the event seeks to introduce new individuals to the cultural institutions.A common entrance pass allows visitors to access all exhibits, as well as to access the public transportation required to reach these various locations.
The first Long Night of Museums () took place in Berlin in 1997. The concept has been very well received, and since then the number of participating institutions and exhibitions has risen dramatically, spreading to over 120 other cities throughout Europe. The idea has been taken by others cities outside Europe such as Buenos Aires in Argentina, whose "La Noche de los Museos" (Night of Museums) takes place since 2004.
Lange Nacht der Museen in Berlin, and other cities of Germany including Cologne,
Nuit Blanche in Paris, and La Nuit des Musées in France