The most famous "flag" featuring five circles is actually the Olympic Flag. Created in 1913 by Baron Pierre de Coubertin, it features five interlaced rings on a plain white background. The rings are colored blue, yellow, black, green, and red (from left to right). These five rings represent the five continents of the world—Africa, the Americas, Asia, Europe, and Oceania—united by the spirit of Olympism. A key design fact is that at least one of these six colors (including the white background) is found in the national flag of every single nation on Earth, making it a truly universal symbol. Beyond the Olympics, you might occasionally see the flag of the World Games, which also utilizes a circular motif, or various historical flags, but the Olympic rings remain the quintessential global representation of five circles. It was first flown at the 1920 Summer Olympics in Antwerp and has since become one of the most recognized symbols in human history.