A coat of plates is a form of segmented torso armour consisting of overlapping metal plates riveted inside a cloth or leather garment. The coat of plates is considered part of the era of transitional armour and was normally worn as part of a full knightly harness. The coat saw its introduction in Europe among the warring elite in the 1180s or 1220s and was well established by the 1250s. It was in very common usage by the 1290s. By the 1350s it was universal among infantry militias as well. After about 1340, the plates covering the chest were combined to form an early breastplate, replacing the coat of plates. After 1370, the breastplate covered the entire torso. Different forms of the coat of plates, known as the brigandine and jack of plates, remained in use until the late 16th century.