A plackart (also spelt placcard, planckart or placcate) is a piece of medieval and Renaissance era armour, initially covering the lower half of the front torso. It was a plate reinforcement that composed the bottom part of the front of a medieval breastplate. They were predominantly worn in the 15th century. Sometimes they were worn with a metal finish, while the top part of the cuirass was covered in material (often velvet), the difference in finish making a contrast.