Painted in tempera on wood before 1332 for the nearby church of San Francesco, the large stationary cross of Guariento di Arpo was commissioned by the noblewoman Bona Maria dei Buvolini. The woman is represented at the foot of the cross in an attitude of prayer: the inscription compares her to Helen, mother of the Emperor Constantine who found the true cross of Christ. The work is among the very few by the artist to be signed Guarientus pinxit at the foot of the cross. Model is the Giotto cross of the Scrovegni Chapel which the artist looks at in the first period of his activity.