The 1915 Panama-California Exposition held in Balboa Park introduced Spanish Colonial Revival architecture to Southern California and to millions of visitors. The California Building and its tower, the Spreckels Organ Pavilion and the “temporary” buildings along El Prado have stirred the souls of San Diegans for over 90 years.  During the 1960s two wonderful buildings on the Plaza de Panama were demolished and other buildings on El Prado were destined to meet the same fate.  A group of determined people stepped up and brought a halt to the destruction. Since its formation in 1967, The Balboa Park Committee of 100 has been a strong advocate for these buildings.