The Seaquist House is the oldest mansion in Texas

The Seaquist House, located in Mason, Texas, is recognized as the oldest mansion in the state. Originally constructed in 1887 as a two-story stone home by Rev. Thomas A. Broad along Comanche Creek, the property underwent significant expansion.

After being purchased by New York banker Edward M. Reynolds in 1891, German architect Richard Grosse redesigned the residence into a three-story Sandstone Victorian featuring 22 rooms. The home eventually passed to Swedish immigrant Oscar Seaquist, from whom it takes its current name.

Following Seaquist's death in 1933, his widow, Ada, maintained the residence by renting out rooms until 1972. The property was added to the National Register of Historic Places in 1974 and is currently open to the public for tours.