The Indiana World War Memorial Military Museum is housed within the memorial itself and highlights the role of Indiana soldiers in conflicts ranging from the American Revolution to World War Two and beyond. Exhibits at the museum feature various firearms, a Cobra helicopter, the USS Indiana's Commission plate, and over 400 military flags (over 300 of these are from the American Civil War). The memorial also houses a 500-seat auditorium, named after General John J. Pershing, three meeting rooms, and a shrine room located on the second floor of the structure. The names of all Indiana's WWI veterans are inscribed on the marble walls of the staircases leading to the room. The War Memorial Plaza is considered to be one of the finest examples of City Beautiful planning, an idea which originated with Charles Mulford Robinson's book Modern Civic Art or the City Made Beautiful. America's cities were--in the early 1900s--desperately overcrowded, polluted, and home to vice and other illicit activities. The motivation behind City Beautiful movement was to revive the urban core of American cities by creating a more orderly and attractive public space. Indianapolis leader adapted this idea and built the War Memorial Plaza with an emphasis on Neo-Classical Revival architecture.
Construction of the Plaza occurred over many years and was the work of Walker & Weeks Architects. The Plaza is book-ended with the Federal Building at the south end and the Public Library at the plaza's north end. The architects' design for the War Memorial was based on renderings of The Tomb of King Mausolos, one of the Seven Wonders of the Ancient World.