The George D. Birkhoff House is a historic house located at 22 Craigie Street Cambridge Massachusetts. It was designated a National Historic Landmark in 1975 for its association with Harvard University Professor George David Birkhoff (1881-1944) one of the most important mathematicians of his time.The house is a three story Second Empire wood frame structure with a mansard roof. Its date of construction is not known but is surmised to be sometime before the 1890s. 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?
The answer to this question is:
Building