warehouse opened in 1985 as an art museum. The headquarters building was constructed on Grierson's orders in 1876, a decade into the fort's military operation. The building is U-shaped, opening to the east, with two chimneys in the main structure and one in the north and south wings. A veranda is attached to the façade and back of the building, between the wings. The headquarters building was used in various capacities in the 20 years after the US Army left Fort Concho. Four of the rooms on the ground floor, the court martial, orderly's room, adjutant's office, and regimental headquarters, have been remodeled to appear as they would have during the fort's military career. About behind the headquarters building is the former residence of Oscar Ruffini, San Angelo's first civic architect. The house was moved to its present location on May 14, 1951. The original hospital was built from 1868 to 1870. After the fort's deactivation, the hospital was used as a rooming house and for storage until it was destroyed by fire in 1911. The building was rebuilt in the mid-1980s with the aid of architectural and historical records. The hospital contains a museum about frontier medicine in its north ward, a library in the south ward, and general medical exhibits in the center. Officers' Row The Officers' Row are the ten buildings on the south side of the parade ground, comprised by Officer's Quarters 1 through 9 and the schoolhouse and chapel. These houses were built in several phases from 1869 to the mid-1870s. They generally follow an L-shaped plan with a primary residential building and kitchen, connected by a veranda. Interiors consisted of four equally sized rooms and a central hallway on the first floor and two more rooms on a second. The houses have three fireplaces; two in the main building and a third in the kitchen. Officer's Quarters 1 was built from 1870 to 1872 and served as the commanding officer's residence. Grierson, who lived there from 1875 to 1882, added a kitchen and office onto the building, on the south and west ends, respectively, in 1881. Grierson also added a carriage house and placed locks on every door in the building. The Fort Concho Museum purchased the building in 1964. In 1994, it was renovated and became the Concho Valley Pioneer Heritage Center. Officer's Quarters 8 and 9 were built to the same plan