I was junior high age, so I very well could have missed something, but I don't recall there being a lot of preservation fuss over the PMA expansion. But I think I've said here before (maybe or not in this thread), in the late 70's the stretch around Congress and Longfellow Squares had become something of a red-light district. The State Theater was subdivided into several porn theaters, at some point the Fine Arts (current Geno's) was a porn house as well, the Treasure Chest head shop was in one of the Congress Building storefronts with bongs in the window, and the Parisienne Sauna, in the building at Longfellow Square that has the New Orleans-style balconies, was advertising "Massage By Women". Plus, of course, the infamous Dunkin' Donuts. There was also the Paris Cinema on Oak St. that at some point (I know not when) switched to showing porn. I still believe that the sunken design of Congress Square Plaza was intended to subconsciously evoke a moat, trying to keep all that stuff west of High St. as much as possible, and the PMA was another part of the "Congress Square Revitalization" project.