Question: The Woodbury County Courthouse is a building that fills an entire quarter block in Sioux City Iowa. It is regarded as one of the finest Prairie School buildings in the United States and has been declared a National Historic Landmark. It is used for legal proceedings in the county. Given a list of categories: company, educational institution, artist, athlete, office holder, mean of transportation, building, natural place, village, animal, plant, album, film or written work, what category does the paragraph belong to?
Answer:
Building