Rugby union in Wales is governed by the Welsh Rugby Union. The top level of Welsh rugby is represented by the regional sides, formed in 2003, who play in the United Rugby Championship (formerly the Celtic League, Pro12 or Pro14). Originally consisting of five teams, there are currently four regional sides in the United Rugby Championship, after the Celtic Warriors were wound up in 2004.
Below these teams is the Super Rygbi Cymru, then the Welsh Premiership, the Welsh Championship split between east and west, then Leagues 1-6 which are also split geographically into further areas.