Adele Bloch-Bauer I (1906), Gustav Klimt
Rank: 74
A striking example of Klimt’s golden period, this elaborate Judgendstil portrait of a Viennese society lady was once the most expensive painting in the world. It is the Neue Galerie’s crown jewel—museum director Renée Price has likened its importance to the institution to the Mona Lisa at the Louvre.—Heather Corcoran
Photograph: Neue Galerie New York/Estates of Ferdinand and Adele Bloch-Bauer