Boston Block

The Boston Block, also known as Aalfs Manufacturing Company, is a historic five-story building in Sioux City, Iowa, built during a significant construction boom in the late 19th century. Completed in 1891, it showcases Richardsonian Romanesque architecture with a distinctive rusticated stone veneer and an iron and glass storefront. Originally part of a larger project by the Boston Investment Company, the building served as the headquarters for Aalfs Manufacturing Company. It was listed on the National Register of Historic Places in 1985, making it a notable site for tourists and researchers interested in architectural history and the development of Sioux City.