 Complete the following phrase:  In 1937 Sternberg painted his first post office mural, Carrying the Mail in Sellersville, Pennsylvania. The mural was commissioned by the former United States Department of the Treasury Section of Painting and Sculpture, later known as the Section of Fine Arts. Sternberg traveled to Chicago, where he studied the citys history, architecture, industry, and workers which resulted in his mural , for the Lakeview post office in Chicago. It depicts the history of the city from its first settlement of Fort Dearborn to the 