main printed feature: printer's ornament
Printers used a variety of ornaments to decorate and as an integral part of setting pages. Headpieces and tailpieces could be made of wood or metal relief cuts that could be swapped in and out of different books, or they could be composed of small pieces of decorative type known as fleurons or flowers. Those fleurons could be used as single pieces of type or combined to form borders of varying sizes and combined into different patterns.