The National Museum of Women in the Arts celebrated its landmark show, “Picturing Mary: Woman, Mother, Idea,” which ended April 12, with a spring gala April 10 that opened up the floors of the New York Avenue building to lively art lovers. Concerning one of the most powerful women in history and art, gala co-chair Janice Obuchowski said that “The Virgin Mary in her self-giving is the antithesis” of what goes on in D.C. “Mary has left the building but not our hearts,” said Bertha Soto Braddock, gala co-chair.