The Rossborough Inn is listed as a historic site by the Maryland-National Capital Park and Planning Commission.

[4] By 1835, financial troubles had doomed the business and the building was being used as a farmhouse by its owner, Charles Benedict Calvert, (1808–1864), whose family owned the nearby Riversdale Plantation.

[5] The Rossborough Inn was a faculty residence when, in 1864, during the Civil War, Confederate Army General Bradley T. Johnson (of Frederick, Maryland) and his cavalry brigade occupied the university grounds, utilizing the building as his headquarters.

[6][7] Extensive renovations by the university (aided by the federal government) have resulted in a significantly more contemporary appearance than the original.

[3][8] Carved in the keystone above the front door is the head of Silenus, made of a rare Coade stone.