Julie Moir Messervy, author of Outside the Not So Big House and known for her design of the award winning Toronto Music Garden, will show gardens that engender spirituality and reveal how spirituality can inform garden design.  Trinity Church, 206 Clarendon Street, Copley Square. Call 617-536-0944 for more information. Co-sponsored by the Arnold Arboretum. $20 Parishioners/Arboretum Members, $25 general public.