Who would have thought to put Jack Nicklaus, the world’s greatest golfer, in the same room with Andy Warhol, the celebrity artist known as much for partying at Studio 54 in New York with Elizabeth Taylor and Elton John as for being the godfather of “Pop Art?”

But on a day in 1977, Nicklaus posed for a Warhol painting that was part of his series of portraits of the top athletes of the 1970s that included Muhammad Ali, Pele, Kareem Abdul-Jabbar and Chris Evert. The series of paintings were commissioned by Richard Weisman, a banker and friend of Warhol’s and Christie’s auction house recently appraised them at more than $5 million each.