Members of the National Park Service removed signage around the President’s House historic site on Independence Mall on Thursday afternoon, in what appeared to be the fulfillment of an executive order from the White House meant to remove displays in America’s national parks that “disparage” the nation.

The signage was part of the exhibition “The President’s House: Freedom and Slavery in the Making of a New Nation,” which was unveiled in December 2010. It provided information about the nine enslaved people who then-president George Washington brought with him to the Philadelphia presidential residence and Washington’s ties to slavery.