The St Louis flag design was created by Professor Theodore Sizer in 1964. His inspiration came from the city’s unique geography and history. The two blue lines represent the Mississippi and Missouri rivers, which meet at St. Louis, while the golden fleur-de-lis pays tribute to the city’s French heritage. The red background symbolizes the strength and unity of the community. Together, these elements make the St. Louis flag one of the most meaningful and recognizable city flags in the U.S.