Tower Building of the Little Rock Arsenal

The Tower Building of the Little Rock Arsenal, also known as U.S. Arsenal Building, is a building located in MacArthur Park in downtown Little Rock, Arkansas. Built in 1840, it was part of Little Rock's first military installation. Since its decommissioning, The Tower Building has housed two museums. It was home to the Arkansas Museum of Natural History and Antiquities from 1942 to 1997 and the MacArthur Museum of Arkansas Military History since 2001. It has also been the headquarters of the Little Rock Æsthetic Club since 1894.

The building receives its name from its distinct octagonal tower. Besides being the last remaining structure of the original Little Rock Arsenal and one of the oldest buildings in central Arkansas, it was also the birthplace of General Douglas MacArthur, who became the supreme commander of US forces in the South Pacific during World War II. It was also the starting place of the Camden Expedition.