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 (German: Lange Nacht der Museen) 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.
Last time the Night of Museums was held in all Lithuania on 16 of May.