Riverside's citizens are proud of the city's unique character born from a tradition of careful planning, from its carefully laid out historic Mile Square to its 1924 Civic Center designed by the same planner responsible for San Francisco's, Charles Cheney. Through the City's Office of Historic Preservation, it is committed to preserving the past as a firm foundation for the future. Over 100 City Landmarks, 20 National Register Sites and 2 National Landmarks have been designated by the City Council, all offering enjoyment and education to city residents and visitors. Many of Riverside's historic buildings are open to the public including the Catherine Bettner home, restored and renamed the Heritage House, is open for tours. The Riverside Art Museum was designed by America's most successful woman architect, Julia Morgan, famous for William Randolph Hearst's Castle in San Simeon. It was originally constructed for the YWCA on land donated by Frank Miller. Benedict Castle was built as a private residence by Henry Jekel and is now occupied by Teen Challenge. It is available for special events and filming as are many of Riverside's historic homes and neighborhoods.