This impressive composite capital consists of a kalathos (or main body) adorned with crowns of acanthus leaves, topped with a four-sided Ionic capital and a Corinthian abacus with molded sides and a central flower. The volutes, with a linear and undecorated channel, feature a small flower at the center. Between the volutes, there is the coat of arms of a Florentine noble family.

This type of capital has its origins in Roman architecture and can be found in many ancient monuments, such as the Arch of Titus or the Arch of Septimius Severus in the Roman Forum. The typology was revived during the Renaissance, especially in Tuscany, and a similar capital can be seen in the Sforza Chapel in Santa Maria Maggiore, designed by Michelangelo and constructed by Giacomo Della Porta.