Master stonecarver Sandro Fiorentini is dressed in brown overalls, working with a technique that dates back to the days of the Romans.

BBC: All roads lead to Rome

Among the most striking of the architectural drawings on display is the study for the plan of San Giovanni dei Fiorentini (1559-60), a sheet in which one can read the layers of overdrawing and erasure through which Michelangelo refined his design, transforming the sheet into a palimpsest of rejected ideas.

WSJ: Masterpieces on a Shopping List | Michelangelo Master Drawings | Museum of Fine Arts Boston | By Cammy Brothers