The World Snooker Championship is professional snooker's longest-running, most prestigious and lucrative tournament. First held in 1927, it is now one of the three tournaments (together with the UK Championship and the invitational Masters) that make up snooker's Triple Crown Series. The tournament is held at the hallowed Crucible Theatre in Sheffield. Stephen Hendry holds the record for the most world titles in the modern era, having won the tournament seven times.