EV programmer Peter Hedlund recently visited the San Francisco Museum of Modern Art and saw the above murals—of Washington’s Mount Vernon and Jefferson’ Monticello—by artist Kerry James Marshall.

Although he holds both George Washington … and Thomas Jefferson in high regard, he challenges their legacy by toying with optical illusions within both landscapes. Figures of slaves are hidden within the murals  because Marshall  believes they have been concealed in popular accounts of these forefathers of American history.

The paintings are on display until May.