New Roxbury Ironworks Site -  New Roxbury Ironworks Site is a historic site in Woodstock Connecticut.It was founded in 1757 and added to the National Register of Historic Places in 1996. Given a choice of categories company, educational institution, artist, athlete, office holder, mean of transportation, building, natural place, village, animal, plant, album, film or written work, the text refers to which one?
A:
Building