The Dialogue of Saint Catherine of Siena

This illustration depicts the front cover of a historical book from 1517. The binding consists of dark reddish-brown leather, which shows some wear at the corners and along the spine. The cover features elaborate decoration made with gold tooling: the process of pressing heated metal shapes into leather through gold leaf. In the center, a large, ornate mandorla: an almond-shaped frame used in art to surround sacred figures or diamond-shaped border is formed by scrolling leaf and flower patterns. Inside this frame is a scene of the Crucifixion: Jesus Christ is on the cross, with the Virgin Mary and Saint John the Evangelist standing on either side. Above Christ's head is a small plaque representing the titulus crucis: the sign placed on the cross that bore the charge against Jesus. Outside the central frame, each of the four corners is stamped with a fleur-de-lis: a stylized lily often used in religious and royal heraldry. Three thin gold lines form a border around the entire composition. Several dark spots or indentations on the leather suggest where metal studs or decorative bosses may have been attached in the past.