Since the US Arsenal in Indianapolis was one of three arsenals commissioned by Congress during the Civil War, it is not surprising that the main buildings followed the same plan. The sturdy storehouses or arsenal buildings were built to convey a strong military presence and all three survive today–over 140 years after construction.

On July 11, 1862, an act established national arsenals “at Columbus, in the state of Ohio, at Indianapolis, in the state of Indiana, and on Rock Island, in the state of Illinois, for the deposit and repair of arms and other munitions of war.” Congress budgeted $100,000 for each of the new arsenals.

Columbus Arsenal Storehouse A plans, courtesy of the National Archives

The plans for the main storehouses were drawn in Washington by the Ordnance Department and were similar to designs already in use at other arsenals. The drawings called for a symmetrical structure in the Greek Revival style with Italian Renaissance details. Interior spaces were left open for storage and the distinctive clock tower had a functional purpose: to haul equipment to the upper floors via a pulley-operated hoist.

Indiana Arsenal, 1916, Courtesy of the Library of Congress (Bass Photo Company #49648)

In July 1863, thirty-one year old Captain Thomas J. Treadwell (who had earlier been at Rock Island) was appointed to supervise construction at the Indianapolis site. Treadwell positioned the storehouse near Michigan Street, just south of a thick forest on the 76-acre site. He stuck closely to the six pages of plans for the storehouse, but each site used materials native to the area, in this case brick and stone. Treadwell wrote to his supervisor on January 13, 1864: “I am determined to make all the bricks required (2,000,000) on the grounds, and hope to have them ready by September first, all material being furnished on the grounds…No useful or ornamental trees are being cut except such as are on the site of the building…Excavation for basement was made during the fall.” Evidently not enough bricks could be made on site as bricks and timber were later ordered from Cincinnati. Foundation and trim stone was hauled from Vernon, Indiana, via the railroad and ox-drawn wagons. In later years an old woman who lived nearby recalled that her fiancé helped build the storehouse. She said that the cornerstone blocks were so heavy that only one could be hauled at a time. Captain Treadwell had difficulty getting supplies to the grounds, so he bought land from neighbors Sturm and Fletcher to build a road leading from the Arsenal to the National Road (now E. Washington Street). Today that road is named Arsenal Avenue.

Although the plans were drawn by an unknown architect for the Ordnance Department, Indianapolis architect Isaac Hodgson oversaw the construction of the Arsenal and other buildings.

Arsenal Technical High School journalism teacher Ella Sengenberger wrote about the building in her undated article Looking Back to Arsenal Days:

The tower of the storehouse, now called the Arsenal, is seven stories high. Through its open archway, paved in cobblestone, carts and wagons would be driven to be unloaded by means of wooden hoist on the fourth floor. The rope which hung down through the tower from the hoist had a huge knot at the end: this made a tempting swing for children. The clock works, enclosed in a glass case on the sixth floor of the tower, are wound by hand, taking four to five minutes to wind. The heavy weights extend down two stories through a shaft. The clock was installed July 6, 1867. A huge bell is mounted on the tower. The clock faces are six feet in diameter. The hands have been replaced twice: the first two sets were of wood; the last of metal. This Arsenal clock was the clock-setter for residents of Woodruff Place. Once, when the clock stopped, workmen found that a Yellow Hammer had become entangled in one of the wheels. When the bell began ringing again, neighbors were heard to remark, “It was like getting a letter from home.”


Columbus Arsenal Building, courtesy of the Columbus Metropolitan Library

For comparison, here is a postcard of the Columbus Arsenal storehouse, also known as the Barracks. Since 1976, Columbus City Schools has used the building for the Fort Hayes Metropolitan Education Center, a public magnet school. Read about its history and see more photos on the school’s web site.

Rock Island (Illinois) Clock Tower Building, courtesy of the US Army Corps of Engineers 

The Rock Island Arsenal storehouse supervisors made many changes to the original plans, including altering the roofline, adding twenty feet to the height of the tower, and using rusticated stone from a nearby limestone quarry. Since 1931 the storehouse, now known as the Clock Tower Building, has been home to the US Army Corps of Engineers, Rock Island District. (Read Roald Tweet’s article “The Rock Island Clock Tower” for an in-depth history.)


Indianapolis Arsenal, 2010 photo posted on Flickr by Adam/Army.Arch

The storehouse served the Indianapolis Arsenal for nearly forty years and was said to have held over 100,000 rifles. After the Spanish-American War the government sold the grounds, which have been home to Arsenal Technical High School since 1912. During that time the building has served as classrooms and administrative offices. (Photograph by Army.Arch)


7 responses to “Indianapolis Then and Now: Arsenal Building, 1500 E. Michigan Street”

  1. Kevin J. Brewer says:


    Thank you for presenting this history of the Indianapolis Arsenal Building, as well as the other two, in this Centennial Year of the school.

    The right hand side this image,!/photo.php?fbid=474237135943562&set=o.107773869783&type=3&theater, contains the hand written Act of Congress establishing the Arsenal at Indianapolis and at two other sites, complete with the authorizing signature of President Abraham Lincoln.

  2. Deborah AJ Gum says:

    Great old building. I’m a graduate of Tech and very proud of this campus. Thanks for spotlighting a part of this history

  3. basil berchekas jr says:

    A VERY interesting article on the history of the development of “arsenals”… keep up the good work! Been to Rock Island Arsenal as well; still an active military installation!

  4. carolstreet says:

    Wonderful post! Thanks for a very interesting article.

  5. Kevin J. Brewer says:

    Arsenal Building sketch from the 1860s on the Facebook page “Old Time Indy’s long missed businesses, and forgotten history.”.

    Tom Dolan found this sketch in an old book and could find no copyright information other than “Electotube Co., Boston” at the bottom of the picture after magnifying it.

  6. Helen L Chastain says:

    My Senior Home Room was located in the Arsenal Tower 1948

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