The Cistercians, or the Order of Cistercians, are a Catholic religious order of monks and nuns that branched off from the Benedictines and follow the Rule of Saint Benedict, as well as the contributions of the highly influential Bernard of Clairvaux, known as the Latin Rule. They are also known as Bernardines, after Saint Bernard, or as White Monks, in reference to the colour of their cowl, as opposed to the black cowl worn by Benedictines.