Olsen House | |
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| Location | 516 North Park Avenue, Helena, Montana |
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| Coordinates | 46°35′33″N112°2′23″W / 46.59250°N 112.03972°W |
| Area | less than one acre |
| Built | 1885 |
| Architectural style | Italianate, Vernacular Italianate |
| NRHP reference No. | 91000333 [1] |
| Added to NRHP | March 22, 1991 |
The Olsen House is a historic house in Helena, Montana. It has been listed on the National Register of Historic Places since March 22, 1991. [2] It stands opposite St. Peter's Cathedral.
The plot of land was purchased in 1874 by Amelia Dissa, and her husband Louis Derrick built a one and a half-story cottage facing Park Avenue. [3] It was built with wood and designed in the Gothic Revival architectural style. [3]
After he died in the late 1870s, she married Ingethen Olsen, an American pioneer who owned a ranch in Fergus County, Montana, but the house remained in her name. [3] By 1884–1885, they built a two-story rectangular addition and a gable. [3] After Olsen died in 1904, his wife replaced the wooden cottage frame with a two-story front built with bluestone; it was completed in 1908–1909. [3] When she died in 1918, the house was inherited by her daughter Amelia M. Olsen, who lived there until 1946. [3]
Four years later, in 1950, the house was purchased by John Conway Harrison, who was elected as a justice of the Montana Supreme Court in 1961. [3] He lived in the house until 1988, and he sold it to Robert Haseman in 1989. [3] The house was later used as offices. [3]
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