{"nrhp_refnum":"78002200","name":"McLain-Gillmer House","other_names":["Gillmer House","Trumbull Art Guild"],"category":"building","location":{"address":"720 Mahoning Ave., NW.","address_restricted":false,"city":"Warren","county":"Trumbull County","state":"OH","lat":41.241747005000036,"lon":-80.82461813499998,"geom_source":"nps_gis"},"listed_date":"1978-06-15","is_nhl":false,"nhl_designated_date":null,"areas_of_significance":["Architecture","Social History","Invention"],"significance_levels":["local"],"summary":{"what_it_is":"A square, wood frame Victorian Italian Villa style house with a gabled rear wing at 720 Mahoning Avenue N.W., Warren, Trumbull County, Ohio, begun in 1854 and now housing the Trumbull Art Guild.","why_significant":"The nomination calls it a landmark of considerable local significance for its vigorous interpretation of the Italian Villa style and its ties to Warren's leading civic and financial figures. Its owners included attorney and banker Thomas Jefferson McLain and electric lighting pioneer Elmer Woods Gillmer. It also introduced several local domestic firsts and remains largely intact on Mahoning Avenue (Millionaire's Row).","narrative":"Built beginning in 1854 on Mahoning Avenue in Warren, Ohio, this wood frame house is a vigorous example of the Victorian Italian Villa style. It has a shallow hip roof with a central belvedere, a modillioned cornice, tall windows with acanthus-leaf lintels, and a porch with a second-story balcony and fluted Corinthian columns. Inside, the central stair, marble fireplaces, and hardwood floors are mostly original. Its first owner, Thomas Jefferson McLain, was a Warren attorney who later served as mayor, postmaster, banker, and newspaper editor. Elmer Woods Gillmer bought it in 1894. A founder of the Peerless Electric Company, he was a pioneer in electric lighting, and the house received Warren's first indoor bathroom, plate glass window, and interior electric lighting. After 1947 it housed local organizations before becoming the Trumbull Art Guild in 1969. It remains one of the few virtually intact houses on Millionaire's Row.","period_of_significance":"1854","architect_builder":null,"architectural_style":"Victorian Italian Villa","criteria":[],"status_note":"Housed several Warren organizations after 1947 and has been the Trumbull Art Guild since 1969; condition listed as good, with only minor alterations for gallery use.","vacant_flag":false,"machine_generated":true,"model":"claude-sonnet-5-5","prompt_version":"v1.0-2026-10-29","generated_at":"2026-10-29 02:53:09.454668-05","source_pdf":"https://s3.amazonaws.com/NARAprodstorage/lz/electronic-records/rg-079/NPS_OH/78002200.pdf"},"photo":{"url_800":"https://nationalhistoricalregister.com/media/78002200/8b03919bb4-800.webp","url_1600":"https://nationalhistoricalregister.com/media/78002200/8b03919bb4-1600.webp","licence":"CC BY-SA 2.0","author":"Jack W. Pearce","credit_html":"<a href=\"https://commons.wikimedia.org/wiki/File:McLain-Gillmer_House.jpg\" rel=\"noopener\">Jack W. Pearce</a>, <a href=\"https://creativecommons.org/licenses/by-sa/2.0\" rel=\"license noopener\">CC BY-SA 2.0</a>, via Wikimedia Commons","source_page":"https://commons.wikimedia.org/wiki/File:McLain-Gillmer_House.jpg"},"district":null,"sources":{"nps_snapshot_date":"2026-05-22","nara_catalog":"https://catalog.archives.gov/id/71991693","wikipedia":null,"wikidata":"https://www.wikidata.org/wiki/Q138752656"},"indexable":true,"url":"https://nationalhistoricalregister.com/ohio/trumbull-county/mclain-gillmer-house-78002200/"}