The first incarnation bikini was in 1913, thirteen years after women were allowed to participate in the Olympics. Created by Carl Jantzen, this “bathing costume” consisted of what were essentially shorts and a T-shirt – and caused quite a stir. Needless to say, we’ve come a long way in just over a century. As for the name, it was in 1947 when Parisian engineer Louis Réard christened his scaled-down version, consisting of a mere 30 inches of fabric, after the Bikini Atoll, the Pacific Ocean site known for hosting the first atomic bomb test on July 1, 1946. In honor of National Bikini Day, let’s take a look at the complete history of one of the most talked about articles of clothing in existence.