A Confederate flag flew atop the historic building that houses the Union League of Philadelphia in a provocative piece of street art that was erected over the weekend on a bus shelter on South Broad Street.

Joe Boruchow’s vision for the artwork formed more than two years ago as he marched through the streets of Philadelphia, protesting the Trump administration. When he passed the Union League, he said, he noticed club members and their guests on a balcony.

“They were sipping martinis, chomping on cigars, and laughing at us,” Boruchow said in an interview. “At the time, no one in our group realized that these people were the ones we should be protesting. This piece is an attempt to awaken the protesting people and help them focus their ire.”

Frank Giordano, a League member and past president, was not amused. He was out of town when he learned of the art display from the Inquirer and Daily News.

“I don’t know if members or guests were mocking the marchers," Giordano said. "The Union League is the furthest thing from the Confederacy. It was founded to support Abraham Lincoln, abolish slavery, and keep the union together. ... To depict it as the Confederacy is just stupid.”

Giordano, president and chief executive officer of the Philly Pops, said the League is private, "but all-inclusive, with members of both parties. ... League members are patriotic and support the free-enterprise system.” He said members pay several thousand dollars a year to belong.

Calls placed to Charles Davidson, the current president, and emails sent to Union League administrators and officials on Sunday afternoon were not returned.

Boruchow, 43, said he knows the league was founded to support the Union, not the Confederacy. His decision to depict the Confederate flag on the roof of the building is meant to poke wealthy, powerful Republicans, who he believes dominate the league’s membership ranks and perpetuate inequality.

“Republicans use their affiliation with the party of Lincoln to get them off the hook for their racism. It infuriates me,” Boruchow said. “This is a stab back.”

The flag is sure to drive public conversation about this particular piece of art, but Boruchow said he hopes members of the public will notice other elements of the drawing, too, such as the police officers chasing a group of hooded teenagers running though the subway.

It took Boruchow 60 hours of careful work with an X-Acto knife to cut his drawing from a single sheet of black paper.

News of the artwork first appeared on the blog Streets Dept, written by Conrad Benner, who is well-known on the local arts scene. The installation, Benner explained, is an “ad takeover” in which artists “seek to retake the messages and art that’s displayed in the public space from commercial advertisers.”

Boruchow is unsure how long his art work will be on display in the bus stop at Broad and Spruce Streets before it’s inevitably taken down but said that displaying his work in public, even for a short time, is the best way to reach the masses and spark conversation. It was still there Sunday afternoon, at the time the League held its annual Lincoln’s Birthday events and a public open house.

“The public display is for my own gratification and ego,” Boruchow conceded. “Only certain types of people come to fine art galleries. Putting my work on the street feels democratic.”