Plate armour, which protected the chest and the lower limbs, was used by the ancient Greeks and Romans, but it fell into disuse after the collapse of the Roman Empire because of the cost and work involved in producing a lorica segmentata or comparable plate armour. Single plates of metal armour were again used from the late 13th century on, to protect joints and shins, and these were worn over a mail hauberk. By the end of the 14th century, larger and complete full plates of armour had been developed. During the early 16th century the helmet and neckguard design was reformed to produce the so-called Nürnberg armour, many of them masterpieces of workmanship and design. European leaders in armouring techniques were northern Italians and southern Germans. This led to the styles of Milanese from Milan, and Gothic from the Holy Roman Empire. England produced armour in Greenwich and they both developed their own unique style.