Historic Preservation Symposium: The Coronado Historical Association will host a free Historic Preservation Symposium on Thursday, May 30, at 6 p.m. The event will be held at the Coronado Historical Association, 1100 Orange Ave. Architect Ione Stiegler will give a presentation titled “Reconstructing the Past: Peeling Back Layers on the Sikes Adobe Farmstead, Warner’s Ranch, and Many More Historic Sites.” Coronado Associate Planner Tricia Olsen will describe the City’s Historic Resource Ordinance and the process to apply for Historic Designation and Mills Act tax incentives.