The Liechtenstein Museum is a private art museum in Vienna, Austria. It contains much of the art collection of its owners, the Princely Family of Liechtenstein, rulers of the principality of Liechtenstein. It includes important European works of art, forming one of the world's leading private art collections. Its highlight used to be Leonardo da Vinci's portrait of Ginevra de' Benci, which was acquired in 1967 by the National Gallery of Art in Washington, D.C.
The museum, which was originally open to the public from the early 19th century until the Anschluss of 1938, had various locations, including the Liechtenstein Garden Palace at Fürstengasse 1 in Vienna's 9th District, and the Liechtenstein City Palace at Bankgasse 9 in Vienna's 1st District. The museum was reopened on 29 March 2004 in the Garden Palace, but after battling with low visitor numbers, it was closed for regular visiting by the public in November 2011. According to the official website of the Garden Palace, "the highlights of the princely collections can be viewed exclusively as part of an event package or a pre-booked guided tour".