In the 1930's and 40's the Great Northern Railroad commission the German painter Winold Reiss to paint portraits of Blackfoot indians. The railroad used these wonderful portraits for an advertising campaign to market their northern line through Glacier Park. Here is a link to the web page devoted to his life and art: http://winold-reiss.org. He really accurately captured a part of history in these depictions. His style is typical of the era, especially in his graphic design. He completed many murals as well. He was very prolific in his art career. It is worth browsing the web site; I can just touch on it here.