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. Duck Mill - The Duck Mill is an historic mill building at 60 Duck Mill Road in Fitchburg Massachusetts. The 3.5 story brick building was constructed in 1852 by industrialist George Blackburn to replace an 1842 mill building that had been destroyed by fire. The mill was used to produce cotton duck.The building was listed on the National Register of Historic Places in 1985.
A:
Building