T. M. Callahan House
house in Longmont, Colorado
The T. M. Callahan House, also known as the ‘’’Sweeny-Callahan House’’’, at 312 Terry St. in Longmont, Colorado, is a large Queen Anne-style house built in 1892 and expanded in 1897 and 1908. It was listed on the National Register of Historic Places in 1985.
It is now an event venue known as the Callahan House & Garden.
It has served as a Women's club building.
Its foundation is red Lyons sandstone.
The original builder in 1892 was James Wiggins. Its interior was extensively renovated by interior designers Mitchel & Halback in 1908.
The house's original construction and 1908 renovation created "many outstanding decorative features...as well as beautifully landscaped grounds."
It was deemed significant as "one of Longmont's most distinguished houses" and for its association with James Koller Sweeny, its first owner and a banker and flour mill manager. Its association with Thomas M. Callahan, founder of Golden Rule Stores is more significant however.
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Vocabulary and entity names are the principal evidence signals here, because they determine the precision of every later search. The source revision retrieved here is dated Sep 5, 2026. The linked authority identifier is Q111942230. Authority coordinates are 40.164, -105.105. 1 of 2 selected statements include explicit references; 0 carry qualifiers and 0 use preferred rank. The first chronological checks are 1892, 1897, 1908 and 1985.
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This entry incorporates text from “T. M. Callahan House” on English Wikipedia. Contributors are listed in the page history. Text is available under the Creative Commons Attribution-ShareAlike 4.0 License. Selected authority identifiers and statements are retrieved from Wikidata under CC0; their references and qualifiers remain part of the verification path.