Brent Sikkema was a high-culture aficionado whose final Instagram post was a sumptuous photo of the Palais Garnier opera house in Paris.

He regularly rubbed elbows with luminaries such as Michelle Obama.

But the Manhattan art dealer — who was found stabbed to death at his home in Rio de Janeiro on January 15 — had a secret side.

Sikkema, 75, had fallen in love with and married a self-admitted male escort and, social media posts show, was a fixture on the gay scene in Cuba, Rio, and Fire Island, NY, for a time.

He was also a devoted father embroiled in a bitter divorce that began in March 2022 and was ongoing at the time of his death, according to public records and Brazilian investigators.