Chainmail armor was used by the last of the Romans, and by some of the invading Germanic tribes, including the Goths. Chainmail armor kept its popularity among the nobility of medieval Europe until, in the 13th century, plate armor began to be used instead, providing greater protection. This change was due to the fact, that the sharp tip of a sword or an arrow could pass through the chainmail.
Helmets also evolved from simple designs to large metal buckets, after which became large sculptured pieces to deflect arrows. Subsequently, helmets were assembled to the rest of the armor.
Full Armor, which could weigh up to 30 kilo, appeared in the 14th century. The armor plates were well designed, and the Knights could still keep a surprising agility. If a Knight with armour fell from the horse, he could easily get up without help. There are anecdotes and descriptions of warriors that wearing a suit of armor made the pine and other exercises in moments of calm.
Armatures put greater emphasis on deflecting projectiles and strengthening the areas most exposed to blows. Later appeared more elaborate models of armor plates with engravings, which were more ceremonial and prestigious than practical.
The armor represented a high cost to the Knight, because he would have to pay for their own equipment and his Squire.
Armor manufacture was a profitable business, and even second-hand armor would take a large part in the Medieval market. During battles, the troops of the victorious side could seize large sums of money stripping and taking armor of the dead Knights.