si-american-art-museum: Cathedral Rocks, Yosemite Valley, Albert Bierstadt, ca. 1872, Smithsonian: A
si-american-art-museum: Cathedral Rocks, Yosemite Valley, Albert Bierstadt, ca. 1872, Smithsonian: American Art MuseumSize: approx. 14 x 20 in. (35.6 x 50.8 cm)Medium: oil on paper mounted on canvashttp://americanart.si.edu/collections/search/artwork/?id=75433 -- source link