The Upside Down Painting Record

About the longest time a painting has hung upside down unnoticed in a museum, in this case a Matisse in the MOMA.

NORRIS AND ROSS MCWHIRTER'S 10 BEST ODDITIES

The Upside Down Record. "The longest period of time for which a modern painting has hung upside down in a public gallery unnoticed is 47 days. This occurred to Le Bateau, by Henri Emile Benoit Matisse (1869-1954) of France, in the Museum of Modern Art, New York City, between October 18 and December 4, 1961. In this time 116,000 people had passed through the gallery."