Jeffrey Epstein kept a telling memento from Bill Gates displayed in his New York City home, a new photo has revealed.

Among photographs with some of the world's most powerful men, Epstein had a framed dollar bill signed by the Microsoft co-founder in the living room of his Manhattan townhouse.

'I was wrong!' Gates wrote on the bill, above George Washington's face, suggesting it was payment for a bet, as noted by The New York Times.

The dollar bill, placed on a credenza, is surrounded by photos of Epstein with Pope John Paul II, Fidel Castro, Elon Musk, Bill Clinton and President Donald Trump, among others.

The display of images included a widely-circulated photo of Epstein with Donald and Melania Trump, but with Ghislaine Maxwell cut out.