Lappet

Worn in a pair, or as a singular long strip giving a symmetrical drape, lappets were a popular form of women's headwear until the early twentieth century, and are still a feature of religious garments.

[2] Through this period, lappets were bright white or black in colour, and made of either simple or highly decorative hand or machine-made lace, or plain lightweight fabrics, including silk.

[2] While some formed part of a headdress, other lappets could be pinned to the top of the hair in a pleated fashion, or simply draped as described above.

[4] The lace popularly used to make lappets had international origins, being created in countries including France, Belgium, Denmark, Ireland, Spain, Britain, Italy, and America, for example.

The two lappets (Latin: caudæ, literally "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.

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.