The rochet was originally a robe-like tunic, and was therefore girdled, like the liturgical alb. So as late as 1260 the provincial synod of Cologne decreed that the "vestis camisialis" must be long enough entirely to cover the everyday dress. A good example of the camisia of the 12th century is the rochet of Thomas Becket, preserved at Dammartin in the Pas de Calais, the only surviving medieval example remarkable for the pleating which, as was the case with albs also, gave greater breadth and more elaborate folds. In the 15th century the rochet only reached halfway down the shin; in the 16th and 17th to the knee; in the 18th and 19th often only to the middle of the thigh.