Photograph of an engraving depicting the celebration that occurred in San Francisco when California was admitted to the Union, after 1850. There is a large crowd gathered to watch a parade, which is led by a float pulled by a team of six horses and ridden by a group of people. A group of uniformed horsemen is watching the parade from the bottom right corner. The parade is starting to pass in front a building with a sign that reads "El Dorado", but the bulk of it remains in front of a long series of buildings whose facades are dominated by marble columns. In the background, the "City Hotel" sign and building can be seen.; Originally, the image was dated by 1849. However, California officially joined the Union in September 9, 1850.