Final answer:
In the 15th century, the coat of plates was often lined with cloth or leather for comfort, with materials such as felt or canvas likely being used. The armor was designed to protect while ensuring wearability, and although luxurious decorations existed in the era, they were more commonly found in other art forms rather than armor.
Step-by-step explanation:
The coat of plates was a form of body armor in use during the 15th century. It consisted of numerous small steel or iron plates that were overlapped and riveted together, forming a solid shell of armor. To enhance comfort and wearability, these metal plates were typically lined with cloth or leather.
Although specific details about the linings can vary based on historical records and archaeological findings, it is reasonable to surmise that materials such as felt, canvas, or other robust fabrics could have been used to line the coat of plates.
This would provide both additional cushioning against the weight of the metal and protection from the chafing or pinching that could occur with the movement of the plates against the wearer's body.