Designed by Proudfoot, Rawson, Souers & Thomas, it was built in 1932 as the Iowa-Des Moines National Bank. It is an excellent example of Commercial Art Deco style, which reached its peak between 1925 to 1935, and represents a radical departure from Classical design. The original plans called for a 16-story tower, but construction stopped at five due to the Great Depression. Materials include granite, limestone, bronze, nickel and pewter. The interior is one of the most elegant spaces in Des Moines. It was placed on the National Register of Historic Places in 1979, when it was restored by architects Charles Herbert & Associates. It was voted one of the top 50 buildings of the 20th century in Iowa.