The Chesme Church also known as Saint John the Baptist at Chesme Palace, St. It is a small Russian Orthodox church that was built by the Russian court architect Yury Felten in at the direction of Catherine the Great, Empress of Russia.
Louis Cathedral (Cathedral-Basilica of St. Louis, King of France) in New Orleans. It's the oldest Catholic cathedral in use in the US -- just steps away from Bourbon Street in Jackson Square. Toured the cathedral in Jan 2013 - beautiful!