Q:Washington Avenue Historic District is a national historic district located in the Hawthorne neighborhood of Philadelphia Pennsylvania. It encompasses eight contributing buildings built between 1889 and 1927. They are large industrial buildings that were occupied by the Main Belting Company John Williams Company and C. J. 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?
A:
Building