Julius' Castle is a castle-shaped building that sits at 1541 Montgomery Street on Telegraph Hill in San Francisco. It served as a visual landmark and as a restaurant for many years, originally opening between 1924 and 1928. Since 1980, the building has been listed as a San Francisco Landmark Number 121. The architecture is described by the San Fra…Julius' Castle is a castle-shaped building that sits at 1541 Montgomery Street on Telegraph Hill in San Francisco. It served as a visual landmark and as a restaurant for many years, originally opening between 1924 and 1928. Since 1980, the building has been listed as a San Francisco Landmark Number 121. The architecture is described by the San Francisco Planning Department as, "primarily derived from the Gothic Revival and Arts & Crafts Styles".