Each action corresponds to an equal and opposite reaction: this is how we could define the evolution of suits of armor throughout history. With the first sharp stone used by man for an offense, the first double-layered animal skin was born to defend against it. Defensive suits always evolved based on the forging of new steel arms over the centuries, ranging from materials such as boiled leather to forged iron armor. With the advent of black powder and its progressive use in battlefields, defensive suits gradually changed in the strength of absorption, then finally disappeared, but for exhibition or luster, in the early eighteenth century. Many public and private collections all over the world boast fine workmanship, embossed or etched inside. Actually, over the centuries, many illustrious names ventured into the creation of these works, that we could define today as pure and elegant jewels.