Osen was a well-known theater painter and mime artist of the early 20th century in Austria. He was a close friend of Austrian painter Egon Schiele. In the early days, the two men had an influence on each other’s creative style and explored the artistic expression methods of medical pathology. Osen’s creative form includes a variety of themes, often blending the characteristics of his style with the style that was popular at the time. He was influenced by Symbolism, Vienna Secession, and Expressionism. The color and brushwork also reveal a romantic style of Impressionism developed in the mid to late 19th century.