The south wing of a much larger building proposed for the Presbyterian synod of Colorado, this vertical vestige is somewhat oddly proportioned. The Italianate three-bay facade has a central projecting two-story pavilion with full-height pilasters and a parapeted pediment for the steep hipped roof, which retains its iron cresting. Light stone trim, with some carving, dresses the patterned brick walls above a rough red sandstone foundation.

After serving as the Longmont Academy and, briefly, Longmont High School, the college was the charge of the Sisters of St. Francis from 1906 to 1948. The sisters added a three-story south side sleeping porch, subsequently enclosed, in 1907. In 1948 the building was converted to the Landmark Apartments.