{"nrhp_refnum":"76000279","name":"Commanding Officer's Quarters, Watertown Arsenal","other_names":["Building 111"],"category":"building","location":{"address":"443 Arsenal St.","address_restricted":false,"city":"Watertown","county":"Middlesex County","state":"MA","lat":42.36044225000006,"lon":-71.16335744799994,"geom_source":"nps_gis"},"listed_date":"1976-10-07","is_nhl":false,"nhl_designated_date":null,"areas_of_significance":["Military","Architecture"],"significance_levels":["local"],"summary":{"what_it_is":"A three-story brick commanding officer's residence, Building 111, built in 1865 on the grounds of the Watertown Arsenal (later the Army Materials and Mechanics Research Center) at 443 Arsenal Street, Watertown, Massachusetts, overlooking the Charles River.","why_significant":"The form cites its architecture as a lavishly detailed Bracketed Style house, unlike the simple military buildings nearby, and its largely unaltered state. It also notes its association with 49 arsenal commanders, several of whom advanced gun manufacturing and management methods. The 1919 Olmsted Brothers landscaping of the grounds adds to its value.","narrative":"Building 111 is the commanding officer's residence at the former Watertown Arsenal, now the Army Materials and Mechanics Research Center, in Watertown, Massachusetts. Completed in 1865 in the Bracketed Style, it is a three-story brick house with a hipped roof, a wooden balustrade, paneled brick chimneys, and a veranda with cast-iron Corinthian columns. Inside, a central hall, an arched stairway, marble fireplaces, ceiling medallions and polychromatic hardwood floors survive largely unaltered. Its plans passed through many revisions under Maj. Thomas J. Rodman, who never lived there; the construction controversy contributed to his removal from command. Forty-nine commanders have since occupied it, among them officers who advanced gun casting, scientific management and gun-tube strengthening. The house is set above the Charles River, and Olmsted Brothers landscaping from 1919 opened its views toward the water. The nomination argues that it is the most ornate building on the arsenal grounds and a distinctive Victorian residence.","period_of_significance":"1865","architect_builder":"Plans by the US Ordnance Department and Maj. Thomas J. Rodman (with draughtsman George W. Horn); master mason Thomas L. French","architectural_style":"Bracketed Style","criteria":[],"status_note":"Condition listed as excellent and unaltered; occupied and used as the commanding officer's residence under government ownership.","vacant_flag":false,"machine_generated":true,"model":"claude-sonnet-5-5","prompt_version":"v1.0-2026-10-29","generated_at":"2026-10-29 02:11:53.812009-05","source_pdf":"https://s3.amazonaws.com/NARAprodstorage/opastorage/live/2/7955/63795502/content/electronic-records/rg-079/NPS_MA/76000279.pdf"},"photo":{"url_800":"https://nationalhistoricalregister.com/media/76000279/10d55ec110-800.webp","url_1600":"https://nationalhistoricalregister.com/media/76000279/10d55ec110-1600.webp","licence":"CC BY-SA 4.0","author":"User:Magicpiano","credit_html":"<a href=\"https://commons.wikimedia.org/wiki/File:WatertownMA_ArsenalCommandersQuarters.jpg\" rel=\"noopener\">User:Magicpiano</a>, <a href=\"https://creativecommons.org/licenses/by-sa/4.0\" rel=\"license noopener\">CC BY-SA 4.0</a>, via Wikimedia Commons","source_page":"https://commons.wikimedia.org/wiki/File:WatertownMA_ArsenalCommandersQuarters.jpg"},"district":{"nrhp_refnum":"99000498","name":"Watertown Arsenal Historic District","url":"https://nationalhistoricalregister.com/districts/massachusetts/watertown-arsenal-historic-district-99000498/"},"sources":{"nps_snapshot_date":"2026-05-22","nara_catalog":"https://catalog.archives.gov/id/63795502","wikipedia":"https://en.wikipedia.org/wiki/Commanding_Officer%27s_Quarters,_Watertown_Arsenal","wikidata":"https://www.wikidata.org/wiki/Q5152223"},"indexable":true,"url":"https://nationalhistoricalregister.com/massachusetts/middlesex-county/commanding-officers-quarters-watertown-arsenal-76000279/"}