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A lappet is a decorative flap, fold or hanging part of a headdress or garment. Lappets were a feature of women's headgear until the early 20th century, and are still a feature of religious garments. Examples of lappets are to be found on the papal tiara and on the Nemes headdress of the kings of ancient Egypt. The same term is also used for similar-looking anatomical features on some animals.
On episcopal mitres
The lappets are probably a vestige of the ancient Greek headband called a mitra (μἱτρα), from which the mitre itself descends. The mitra was a band of cloth tied around the head, the ends of the remaining fabric of which would fall down the back of the neck.
The Latin name for the lappets is infulae, which were originally headbands worn by dignitaries, priests, and others among the ancient Romans. They were generally white. Mitre lappets are often lined with red silk.
On the papal tiara
Since early mediæval times each papal tiara has included two lappets. Their origins remain a mystery, though they are obviously an imitation of the lappets on the bishop's mitre. It has been speculated that lappets first were added to papal tiaras as a form of sweatband, with inner cloth being used to prevent popes from sweating too heavily during papal ceremonial in hot Roman summers.
The two lappets (Latin: caudæ, lit. "tails") at the back of the tiara are first seen in the pictures and sculpture in the thirteenth century, but were undoubtedly customary before this. Strange to say, they were black in color, as is evident both from the monumental remains and from the inventories, and this color was retained even into the fifteenth century.
Papal lappets on tiaras came to be highly decorated, with intricate stitching in gold thread. Often a pope who either commissioned a tiara, received it as a gift, or who had it remodelled for their usage, had their coat of arms stitched on to the lappets. Many later papal lappets were made of embroidered silk and used lace.
The last tiara to be used for a coronation, created for Pope Paul VI in 1963, also contained lappets.
The word is also sometimes used to refer to wattles, flap-like structures that occur on the faces of some animals. For instance, the Lappet-faced vulture has lappets of bare flesh on the sides of its head.
- Latin infula means "a band, bandage", cognate with Sanskrit bhāla "brow" and Greek φάλος, φάλαρα, a Homeric term for a part of the helmet. It came to refer to the white and red fillet or band of woollen stuff worn upon the forehead by priests as a sign of religious consecration. infŭla in Lewis and Short, A Latin Dictionary (1879).