Today is the 50th anniversary of our city’s flag, designed by Yale art professor Theodore Sizer and officially adopted on February 3, 1964. The blue lines represent the confluence of the Mississippi and Missouri rivers, the center medallion represents the Louisiana Purchase, and the fleur-de-lis, the city’s French heritage. The colors signify the various countries associated with the city: Spain, France, and the United States. The flag was nationally recognized in 2004 when it was named one of the five best city flags in the United States. This flag can be seen in the Missouri History Museum’s 250 in 250 exhibit which opens Friday, February 14.