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. Petty-Roberts-Beatty House - The Petty-Roberts-Beatty House also known as the Octagon House is an historic octagonal house in Clayton Alabama. The structure was one of only two antebellum octagonal houses built in Alabama and is the only one to survive. This unusual house was built by Benjamin Franklin Petty starting in 1859 and completed in 1861. Petty was a carriage and furniture merchant who was a native of New York and pioneer settler of Clayton.
The answer to this question is:
Building