The clue was: This former charter-school building in Park Square is being redeveloped into a 128-unit luxury apartment complex with a restaurant on the ground floor called Liquid Art House.
The answer is: What is 100 Arlington Street? Most of you nailed this (and we accepted "What is the corner of Arlington and Stuart?" as well). Indeed, the building is to be redeveloped by a team that includes the Related Companies, the same force behind the Clarendon luxury condo tower, into luxury apartments with ground-floor retail.
· Clarendon Developer Licks Luxury Chops Over Charter School [Curbed Boston]
· Our Games archive [Curbed Boston]