The treatise surveys the development, materials, and social meanings of head coverings from antiquity to modern times, describing caps, hoods, brims, helmets, and ceremonial crowns across cultures. It traces manufacturing techniques such as felting alongside legends of their origin, catalogs decorative practices like feathers, jewels, and metalwork, and explains how form and color signal rank, profession, or ritual role. Regional sections compare Egyptian, Greek, Roman, and Eastern styles, noting characteristic shapes, military and religious uses, and the range of materials from fur and wool to canework and silk, with numerous illustrative figures.