World Series of Poker
The World Series of Poker (WSOP) is a series of poker tournaments held annually in Las Vegas and, since 2005, sponsored by Caesars Entertainment Corporation (known as Harrah's Entertainment until 2010). It dates its origins to 1970, when Benny Binion invited seven of the best-known poker players to the Horseshoe Casino for a single tournament, with a set start and stop time, and a winner determined by a secret ballot of the seven players.
World Series of Poker Tournament of Champions
The first event took place on 1 September 2004 with invitations only being extended to ten of the most well-known names on the poker tournament circuit at the time. The winner took home a $2,000,000 prize. No other participants received prize money.