Please answer the following question: John Hancock Tower - The John Hancock Tower officially named Hancock Place and colloquially known as The Hancock is a 60-story 790 ft (240 m) skyscraper in Boston. The tower was designed by Henry N. Cobb of the firm I. M. Pei & Partners and was completed in 1976. In 1977 the American Institute of Architects presented the firm with a National Honor Award for the building and in 2011 conferred on it the Twenty-five Year Award. 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