Plate armour protecting 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. 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 full mail haubergeon. By the end of the 14th century, larger and complete full plates of armour had been developed. During the early 1500s 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.