 Also notable is the urn of Saints Marcellinus and Peter, sculpted mostly by Benedetto Briosco (1506-1513), in the crypt.The wooden choir, with inlay work by Platina (1482-1490), and the contemporary large altar cross in silver and gold, by Ambrogio Pozzi and Agostino Sacchi (1478), in the right aisle of the northern transept, are also notable.The most important figurative complex of the cathedral is the fresco decoration on the side walls of the nave (early 16th century), portraying the "Life of Mary and Christ".