Coolidge himself has a couple of awkward paintings and a quite affecting lilac-wood sculpture on permanent view at the mansion. He and his friends would have appreciated “Art Encounters Preservation,’’ a sprawling exhibit of site-specific installations inside and outside the house, on property that is now a state park. Curator Allison Newsome has brought together more than 30 artists to make work that responds to the history and environment of the place. This mansion is par… (View original article)