San Francisco is a big city in the US state of California, whose patron is Saint Francis. This American metropolis is mainly associated with the red Golden Gate Bridge, the prison on the nearby island of Alcatraz and extremely steep and winding streets situated on the slopes of the hills. The city has very interesting housing that represents a real mixture of architectural styles, which has been strongly affected by numerous earthquakes and fires that resulted in the need for reconstruction of particular parts of the city. In addition, San Francisco is an area densely populated and extremely cosmopolitan, which is also reflected in the eclectic character of its particular districts.