As part of its 40th Anniversary Celebration, the exhibit affords the opportunity to highlight the history of the PMA while also imparting the remarkable story of the building in its manifestations as the Petaluma Carnegie Library and as the Petaluma Historical Library & Museum. Three themes will run throughout the exhibit: the wisdom of architectural preservation (a goal of the exhibit is to bring to the attention of the community the need to retrofit the PHL&M); the cooperation between Petaluma’s citizens and city officials in planning, building, repurposing and maintaining the PHL&M; and the essential role women and Progressive Era policy played in the building’s history. An extensive, free Program of Public Service has been scheduled to accompany the exhibit; a tour of the exhibit will be given each weekend by its curator, Paula Freund; and reservations for private and school group tours will be taken. The Petaluma Historical Library & Museum is located at 20 Fourth Street in downtown Petaluma and is open to the public Thursday through Sunday 10 to 4. Admission to the exhibition is free. Donations welcome. For additional information: 707-778-4398, petalumamuseum.com.