The traditional chef's hat, or toque blanche, is what is most distinguishing and recognizable of the uniform, and also the component which often causes the most debate. Chefs as far back as the 16th century are said to have worn toques. During that period artisans of all types (including chefs) were often imprisoned, or even executed, because of their freethinking. To alleviate persecution, some chefs sought refuge in the Orthodox Church and hid amongst the priests of the monasteries. There they wore the same clothes as the priests-including their tall hats and long robes-with the exception of one deviating trait: the chef's clothes were gray and the priest's were black.