The USS Constitution, the late 18th century U.S. warship that has now been converted into a museum, was nicknamed "Old Ironsides", but her sides are not actually iron. They are made of dense hardwood in multiple layers, with the grain at a different angle each layer like in the video (but not chemically or pressure treated). This was originally intended to prevent deformation of the wood under load, but the crew found it was strong enough to deflect cannon fire.