The Appeal to Heaven flag, which bears a pine tree on a white background with its titular slogan, was among the original 18 raised by the city on June 14 — Flag Day — in 1964, each commemorating “a key moment in or symbol in American history,” according to a statement from the Recreation and Park Department, which manages the Pavilion of American Flags across from City Hall.

But the meaning of the pine tree emblem, originally flown from George Washington’s ships during the Revolutionary War, has shifted in recent years. It’s among several images appropriated by conservative movements and appeared conspicuously in riots at the U.S. Capitol on Jan. 6, 2021, carried by people seeking to stop the certification of Joe Biden’s election as president.