Watch the full episode. See more Antiques Roadshow.

The General Services Administration owns federal buildings, but many people may not realize that it also owns the public art inside them. It turns out that thousands of pieces of art commissioned between 1933 and 1943 under New Deal programs, including the Works Progress Administration, are missing.

The U.S. Government employed thousands of artists to create these artworks. But over time, many of works disappeared or ended up in private hands. The agency’s Fine Arts Program is tasked with recovering them.

This New Deal art was featured over the Memorial Day weekend on PBS’s “Antiques Roadshow.” GSA Inspector Brian Miller discusses his team’s search for the missing artworks, which include paintings, sculptures, murals and prints.