Our own Cybah looked up and noticed all these plywood windows on the new 55-story Millennium Partners tower in Winthrop Square. Probably nothing to worry about, but Bostonians still haven't forgotten time the Hancock tower became the world's tallest plywood building in the early 1970s.
1973 Hancock photo by Ernst Halberstadt, from the BPL's Ernst Halberstadt collection.
Marc Ebuña writes this is no Hancock in the making:
Those are where the tower crane was mounted to the building. The window panels will be installed later by the same crane built into the mechanical penthouse at the top that will be used to do maintenance/window washing on the building when it's occupied.