Information by Wikipedia
Swimming has been recorded since prehistoric times; the earliest recording of swimming dates back to Stone Age paintings from around 7,000 years ago. Written references date from 2000 BC. In 1778, Nikolaus Wynmann, a German professor of languages, wrote the first swimming book, The Swimmer or A Dialogue on the Art of Swimming (Der Schwimmer oder ein Zweigespräch über die Schwimmkunst). Competitive swimming in Europe started around 1800, mostly using breaststroke.
Men's 200m Butterfly Finals (Michael Phelps) - Olympic Swimming Trials 2012
Michael Phelps is an American swimmer who has won 22 Olympic medals (18 Gold, 2 Silver, & 2 Bronze). He is an Olympic legend who broke the record for most medals while participating at the London 2012 games. His individual haul of medals over the past 3 Olympics has surpassed the totals of most countries in all of the combined Olympic games of the past century so his achievement is truly astonishing.