The Gleim Building, 265 W. Front St., Missoula, Montana, was a brothel constructed in 1893 for Mary Gleim, a notorious madam who owned at least eight "female boarding houses". This building serves as an example of a vernacular adaptation of Romanesque architecture. The building features arched windows, checkerboard banding, and granite sills. The building's facade and its east and west sides have been restored to their original appearance. The building reflects the impact railroads had on Missoula early in its history.