Cornerpieces are metal plaques attached to the corners of the boards of a binding to protect them, a popular feature from the fifteenth century on. The term also refers to a decorative motif in the corners of a miniature or border.
Michelle Brown , mzh
Corničre; Canton; Coin
Cantonale; Cantone; Angolo; Salvapunte; Punta
Michelle Brown. Understanding Illuminated Manuscripts (Malibu, CA: J. Paul Getty Museum in association with the British Library, c1994).