Beginning in the 1980s Red Lodge experienced a revival in interest in the historic content of the town. As a result, a great many of the buildings in the historic district had the later, non sympathetic renovations and coverings reversed or removed, exposing as much as possible of the original materials and design of the buildings. This building, unfortunately, was remodeled on the ground floor using brick to create arches that didn't appear on the building in 1899. Undoing the change would be cost prohibitive, so the arches remain.
In the original nomination form this building is referred to as the Carbon County Mercantile Company while, by the time of the second boundary increase it was referred to as the D. G. O'Shea Block. Why, we know not.
In any event, this was the home of the Carbon County Mercantile Company. This is one of their many newspaper ads, placed at the head of page 5 of the June 20, 1902 issue of the Red Lodge Picket.
Bozeman brick masons, John and Leslie Devitt, were hired to build the
Spofford Hotel (1893), and returned to Red Lodge to erect the D. G. O'Shea Block
(1899), the W.R. Hall Building (1900), and Albert Budas Building (1900) during
the city's greatest construction boom.
From the NRHP Registration Form