The Isabella Stewart Gardner Museum’s new wing makes a horticultural statement. By moving the entrance from the Fenway traffic to quiet Evans Way and replacing the old fencing there with new trees, open lawn, and a working greenhouse, architect Renzo Piano has created a connection with Frederick Law Olmsted’s Evans Way Park across the street. The result feels almost pastoral - and transparent. You can look into the new greenhouse along Evans Way and see staffers and students working with plants.