Bell Trinity Square is an office complex occupying part of the former site of the historic Eaton's Annex in downtown Toronto Ontario Canada. The name is a combination of: the name of original and now former occupant Bell Canada; and the location of the site south of the Church of the Holy Trinity and Trinity Square.Built in from 1980 to 1983 and designed by architect John B. Parkin the post modern complex consists of 15 floor and 10 floor towers connected by a glass atrium. 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