The San Leandro Historical Society is an all-volunteer nonprofit organization with a mission to build awareness and appreciation of the history of our diverse city. We are entirely funded by dues and donations, and we hope you will join or donate to support our events and presentations exploring local history.The Historic Little Brown Church, once the Sunday school wing of the First Presbyterian Church, is the home of the San Leandro Historical Society. It shares the lot with the Casa Peralta and San Leandro History Museum, in San Leandro's downtown history complex.