A swastika flag was hoisted above the roof of a New York University building named in honor of a billionaire philanthropist who has donated to Jewish causes.

Hundreds of students and parents spotted the symbols associated with Adolf Hitler’s Nazi Party on the purple and white flag – which also contained the letters “NYU” and the Star of David – during the university’s annual Grad Alley block party at around 5 p.m. Wednesday, the university’s newspaper Washington Square News reported.

The flag was hoisted above NYU’s Steinhardt School of Culture, Education, and Human Development building, which overlooks Washington Square Park and has paid homage to philanthropists Michael and Judy Steinhardt since 2016.

Steinhardt and his wife Judy have donated to several Jewish causes – but she told the Bedford and New Canaan Magazine last year, “We are devoted to Jewish life and values, but we are not religious.”

“We are shocked and deeply troubled that this hateful symbol expressing antisemitism was raised on a…