Original: The reforms were largely carried out by Saint Odo ( c. 878 -- 942 ) and spread throughout France ( Burgundy , Provence , Auvergne , Poitou ) , into England , and through much of Italy and Spain.Justus.Anglican.org
Simplified: It spread through France ( Burgundy , Provence , Auvergne , Poitou ) , England and much of Italy and Spain .