WASHINGTON — If you have been to the Washington National Cathedral, you know the stained glass windows tell a story. Now, the cathedral is trying to expand that story by having you share yours.

Gwendolyn DuBois Shaw, an art historian at the University of Pennsylvania who served on the cathedral’s window-replacement committee, said Marshall was an obvious choice to design the new windows.

The landmark Washington National Cathedral unveiled new stained-glass windows Saturday with a theme of racial justice, filling the space that had once held four windows honoring Confederate Gens.