An effort to find and restore WPA murals in Chicago’s public schools has turned up hundreds of them – many painted over or tagged with graffiti. “Others had tears and severe water damage. And all of them were covered with up to 70 years’ worth of dirt and grime.” So far the project has resulted in restoration of 400 heavily damaged and hidden murals, painted during the WPA (1933-1943) and Progressive Era (1904-1933). Many of the works are by prominent artists.