How many visitors noticed that "Matisse's Le Bateau" was upside down in 1961 in the Museum of Modern Art?

Answer 1

Is this a quiz game? By the time the mistake was realized 116,000 people had attended by the exhibition.

Answer 2

The work, Le Bateau by Matisse, hung upside down for 47 days in the Museum of Modern Art exhibition The Last Works of Henri Matisse. It was uprighted after Genevieve Habert, a Wall Street stockbroker, noticed the mistake. At first she notified a museum guard, who responded, "You don't know what's up and you don't know what's down and neither do we." After trying to get someone to listen, Habert gave up and called the New York Times about the mistake. The next day, after the director of exhibitions, Monroe Wheeler, was notified, the work was rehung properly. In response to questioning, the Times reported that Wheeler could only remember three other times when a similar event had occurred.

So, who knows how many people had noticed. Maybe plenty. But only after some media coverage the mistake was officially recognized.