It is noted for its pictorial decoration which is of the highest quality and for its perfect proportions and is considered among the most outstanding works of its type.

For centuries the baptismal font stood in the western part of the nave, until it was moved to the last of the northern side-chapels (George's chapel) in 1653.

The lively decorative style foreshadows Gothic art, but also shows a Byzantine influence, especially in the architectural elements.

The image program, divided into three horizontal bands and four vertical columns, is of great symbolic significance.

Vertically, the baptism of Christ correlates with his anointment by the prostitute, the Mother of God with the staff of Aaron, the Exodus with the Massacre of the Innocents and the Ark of the Covenant with the personification of Mercy.