Please answer the following question: Alexander Wade House was the home of educator Alexander Wade (1832-1904) who became known for the system of grade promotional exams and graduations he developed to serve needs of rural students. The system was adopted widely.The house was declared a U.S. National Historic Landmark in 1965. The property was added to the Chancery Hill Historic District in 2001. 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