Federal workers are restoring an exhibit on the people once enslaved by President George Washington in Philadelphia despite an ongoing legal fight between the city and the Trump administration.

Conservation and historical organizations are suing the Trump administration over National Park Service policies that the groups say erase history and science from America’s national parks.

A federal judge has ordered an exhibit about nine people enslaved by George Washington to be restored at his former home in Philadelphia after President Donald Trump’s administration took it down last month.