In the 13th Century, most Armored headgear was constructed from a single cast piece of shaped iron or steel composite. The Byzantine began to experiment with incorporating Ancient Roman segmentation for helmets. Using this method became somewhat more labor intensive, but produced a superior Battle Helmet. designed in 1/2 to 1-inch plates, it took up to 8 shaped plates riveted to each other. The general shape was affixed to a circular band. On the Crown of the Helmet, was a brass stud, upon which was fixed plumage or related decoration (depending on the particular Unit). The segmented Helmet was fitted with an innovative leather "cap" and attached chin strap, which allowed for the Helmet to properly fit the head of the Wearer. Thus particular design would continue, more or less unchanged until the 15th Century.