Science Thomas Jefferson Landscape Painting Mastodons It all leads back to Humboldt . Alexander von Humboldt and the United States: Art, Nature, and Culture Discover how in just six weeks the greatest thinker, explorer and naturalist of his age changed America and American art forever. On view March 20–August 16, 2020 AmericanArt.si.edu | 8th and F Streets, NW | Open daily 11:30 am–7 pm | Free Friedrich Georg Weitsch, Portrait of Alexander von Humboldt (detail), 1806, oil on canvas, Staatliche Museen zu Berlin, Nationalgalerie. Photo credit: bpk Bildagentur / Nationalgalerie, Staatliche Museen, Berlin, Germany / Klaus Goeken / Art Resource, NY.