For decades, Bill Cosby and his wife, Camille, have built one of the world’s most celebrated collections of African-American art. While their collection usually resides in their home, in celebration of the National Museum of African Art’s 50th anniversary, they’ll loan the the pieces to the Smithsonian for the next year. Their works will be shown alongside pieces from the museum’s collection to create, as the exhibition’s title suggests, a conversation between artworks created on two different continents. In addition to spiritual works by South African artist Gerard Sekoto and American painter Henry Ossawa Turner (pictured), visitors will also spot textiles, bowls, and masks. You’ll surely find some things worth discussing. The exhibition is on view daily, 10 a.m. to 5:30 p.m. at the National Museum of African Art, 950 Independence Ave. SW. Free. (202) 633-4600. africa.si.edu.