Petaluma's newest event venue "HALL of the ABOVE" hosts an open house and centennial celebration Saturday, April 25, 2026, Noon - 4:00 p.m. at 199 Petaluma Blvd. North, Petaluma. This building was originally the Sonoma County National Bank and Petaluma Savings Bank which first opened its doors on Saturday, April 25, 1926. One hundred years …