Olympic Movement flag
Proportions 2:3, created 1913, adopted 1914, first used 1920.

Colors as per https://olympics.com/ioc/news/in-1913-pierre-de-coubertin-designed-one-of-the-world-s-most-famous-symbols
Dimensions of the rings taken from https://olympics.com/ioc/news/in-1913-pierre-de-coubertin-designed-one-of-the-world-s-most-famous-symbols
Manual reconstruction by SpinnerLaserzthe2nd
Original author: Pierre de Coubertin (1863-1937)