We have discussed this before. We are always looking for ways to frame the main subject. San Francisco City Hall has many of these architectural features which can become attractive frames for the main subject. San Francisco city hall is loaded with arches, squares, circles and rectangles. This was a prevalent design feature of this type of structure built in the early 20th century. City Hall is a great example of Beaux-Arts Architecture with it's patterns and repeating lines and features. This French Style of architecture has heavily influenced the building of large structures in the United States. City Hall was one of the first!