Pick one category for the following text. The options are - company, educational institution, artist, athlete, office holder, mean of transportation, building, natural place, village, animal, plant, album, film or written work. Mannheim (San Mar Maryland) - Mannheim is a historic home and former grist mill located at San Mar Washington County Maryland United States. The house is a 2-story three-bay structure built of roughly coursed local limestone with a one-story stone kitchen wing. Also on the property is a large frame bank barn and a small board-and-batten service kitchen or wash house. Nearby are the remains of a saw mill a large 2 12-story grist mill.
The answer to this question is:
Building