The 15,000-square-foot house that brothers Pat A. and John Landergin commissioned from a Kansas City firm attested to their success as cattle ranchers. The two-and-a-half-story stone-trimmed house of reddish-brown brick has projecting one-story wings and the monumental central portico, supported on paired, cast-iron Ionic columns, and has a raised and balustraded terrace to each side. Inside, wood-paneled reception rooms open from the central hall, and plaster reliefs depicting scenes from the Landergins’ Alamosa Ranch were installed in the basement-level clubroom. The house was acquired in 1940 by oilman and philanthropist Don D. Harrington and his wife, Sibyl Buckingham, of Amarillo. The couple left an endowment so that their house could be open to visitors by appointment as a museum. Much of the Landergins’ furniture remains in the house, as does Sibyl Harrington’s couture collection.