Watertown Arsenal

The Watertown Arsenal was a major American arsenal located on the northern shore of the Charles River in Watertown, Massachusetts. The site is now registered on the ASCE's List of Historic Civil Engineering Landmarks and on the U.S.'s National Register of Historic Places, and it is home to a park, restaurants, mixed use office space, and currently serves as the national headquarters for athenahealth.HistoryThe arsenal was established in 1816, on 40acre of land, by the United States Army for the receipt, storage, and issuance of ordnance. In this role, it replaced the earlier Charlestown Arsenal. The arsenal's earliest plan incorporated 12 buildings aligned along a north-south axis overlooking the river. Alexander Parris, later designer of Quincy Market, was architect. Buildings included a military store and arsenal, as well as shops and housing for officers and men. All were made of brick with slate roofs in the Federal style, and a high wall enclosed the compound. By 1819 all buildings were completed and occupied.The arsenal's site, duties, and buildings grew gradually until the American Civil War, enlarging beyond the original quadrangle. During the war it greatly expanded to produce field and coastal gun carriages, and the war's impetus led to the quick construction of a large machine shop and smith shop built as contemporary factories, as well as a number of smaller buildings.