A crest is a component of a heraldic display, consisting of the device borne on top of the helm. Originating in the decorative sculptures worn by knights in tournaments and, to a lesser extent, battles, crests became solely pictorial after the 16th century (the era referred to by heraldists as that of "paper heraldry"). A normal heraldic achievement consists of the shield, above which is set the helm, on which sits the crest, its base encircled by a circlet of twisted cloth known as a torse. The use of the crest and torse independently from the rest of the achievement, a practice which became common in the era of paper heraldry, has led the term "crest" to be frequently but erroneously used to refer to the arms displayed on the shield, or to the achievement as a whole. Origin The word "crest" derives from the Latin crista, meaning "tuft" or "plume", perhaps related to crinis, "hair". Crests had existed in various forms since ancient times: Roman officers wore fans of feathers or horsehair, which were placed longitudinally or transversely depending on the wearer's rank, and Viking helmets were often adorned with wings and animal heads. They first appeared in a heraldic context in the form of the metal fans worn by knights in the 12th and 13th centuries. These were primarily decorative, but may also have served a practical purpose by lessening or deflecting the blows of opponents' weapons (perhaps why their edges came to be serrated). These fans were generally of one colour, later evolving to repeat all or part of the arms displayed on the shield. The fan crest was later developed by cutting out the figure displayed on it, to form a metal outline; this evolved in the late 13th and early 14th centuries into a three-dimensional sculpture. These were usually made of cloth, leather or paper over a wooden or wire framework, and were typically in the form of an animal; also popular were wings, horns, human figures, and panaches of feathers. These were probably worn only in tournaments, not battle: not only did they add to the already considerable weight of the helm, they could also have been used by opponents as a handle to pull the wearer's head down. Laces, straps, or rivets were used to affix the crest to the helm, with the join being covered by a circlet of twisted cloth known