Wenner-Gren Center -  Wenner-Gren Center is a tower and building complex in Vasastaden Stockholm Sweden. The building was constructed 1959–1961 and opened in 1962.The Center consists of three buildings named Helicon Pylon and Tetragon. Pylon is a high tower Helicon is a lower semicircular part surrounding the tower and Tetragon is a box-shaped building next to the tower. 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?
The answer to this question is:
Building