sentences:  In the 1970s, the school underwent major renovations, adding a new gymnasium and cafeteria.A large new wing in the Brutalist style was added to the rear of the building, designed by the Colletti Brothers of Hingham, built atop Oliver Street, which was controversially razed for the construction; the old glass "gondola" in the rear of the old building which served as the principal's office in the 1950s and 1960s was also removed.Finally, the entrance to the school was changed, removing stairs leading into a second-floor vestibule as well as two flanking concrete statues of lions.