Template:POTD/2008-06-05
An 1851 daguerreotype of Portsmouth Square, San Francisco, California. Now a one-block square in Chinatown, it is located on the site of the first public square established in Yerba Buena, the Mexican community that became San Francisco. It is named after the USS Portsmouth, which raised the American flag here at the onset of the Mexican–American War.Daguerreotype credit: Unknown