Copper sheathing is a protective layer made from copper that is often applied to the hulls of ships. This material helps prevent corrosion and damage from marine organisms, such as barnacles and algae, which can affect a vessel's performance and longevity. The use of copper sheathing dates back to the 18th century and was popularized by naval ships. In addition to its use in shipbuilding, copper sheathing is also utilized in various architectural applications. It can be found on roofs, domes, and decorative elements, providing both aesthetic appeal and durability. The natural patina that forms on copper over time adds to its charm while enhancing its resistance to the elements.