The influence of the Hudson River School and Luminism was focused on a western United States location about 1870 when Albert Bierstadt (1830–1902) produced "Sunrise, Yosemite Valley". This grandiose example of the artist’s work was completed after Bierstadt’s third trip to the American west. It was added to the ACMAA collection in 1966. Another Hudson River School painter who headed west was Thomas Moran (1837–1926). Moran, famous for his paintings of the Yellowstone region of Wyoming, is represented in the ACMAA collection by his 1874 oil "Cliffs of Green River" (see picture gallery below).