In the Oratory of the Crib (Oratorio del Presepio) are the moving 13th-century sculptures of Joseph, the Three Kings, the ox, and the ass, by Arnolfo di Cambio (Mary and the child Jesus are 16th-century additions).
Joseph, the Three Kings, the ox, and the ass appear in sculpture form in di Cambio's Oratory of the Crib.
The original Oratory of the Crib only features Mary and the child Jesus.