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Bill Clinton in a blue dress was the least of it.

Jeffrey Epstein kept a creepy home office in his Upper East Side townhouse that was decorated with a $5.9 million painting of a woman cupping her bare breast – along with a taxidermied tiger and poodle, photos obtained by The Post revealed Thursday.

The pictures also show the ornate and ostentatious furnishings favored by the convicted pedophile, including a crystal chandelier, a pair of matching candelabra, a carved-wood, lacquered sideboard and a massive, floral-pattern rug.

The cellphone images were snapped by a hedge fund trader who said he went to Epstein’s mansion to pitch his investment strategy to the multimillionaire, who apparently hanged himself in jail on Saturday while awaiting trial on federal child sex trafficking charges.

“When I showed up, they took me upstairs – I think by mistake, they thought I was someone else – and they left me,” the trader said.

“I just took some pictures because it was so odd.”

The hedge funder described Epstein’s office as “very opulent, all dark burgundies and reds,” adding that “the picture behind the desk was very interesting” and obviously painted by “a decent artist.”

Online records show the oil-on-canvas portrait, “Femme Fatale,” was created around 1905 by Dutch-French artist Kees van Dongen and was most recently purchased by an unidentified bidder during a November 2004 auction at Christie’s.

But the most striking items in the room were the taxidermied animals.

“The stuffed toy poodle was really kind of crazy. It wasn’t fake fur at all,” the trader said.

“It looked like he needed to be dusted.”

And the tiger, the trader said, “was huge.”

“I don’t think the pictures really give proper dimensions,” he said.

“The desk had to be one of the biggest desks I’ve ever seen, and that tiger just dwarfed it.”

Revelation of the office’s interior came a day after a photo surfaced showing that Epstein’s East 71st Street townhouse was also decorated with a bizarre painting of his onetime pal, ex-President Clinton, wearing a Monica Lewinksy-style blue dress and red women’s pumps while lounging in a chair in the Oval Office.

The trader said he was ushered out of Epstein’s office after about 10 minutes and brought to a nondescript waiting room before being introduced to the financier.

“I remember he had a really hot secretary and he came off with a lot of bravado,” the trader said.

But while Epstein was “very enthusiastic during the presentation,” he never followed up afterward, despite the fact that he heard pitches from a group of hedge funders who offered “four different strategies and styles.”

“There were some really quality guys that we put before him,” the trader said.

“It makes me think – just purely speculation – that they weren’t really trading, just pretending to trade.”