Underneath the sottopassaggio in Piazza delle Cure is an art exhibit unlike any other in Florence. The admission is free, the hours of operation are up to the visitors, the curator is self-appointed and, best of all, there are no lines. Ten years ago, local residents would suggest that you take the long way around the passage. This space was occupied by the homeless and the general environment was not exactly welcoming. That was before Salvatore moved in.