After centuries in which the custom had grown weak, Sixtus V, with the apostolic constitution Romanus pontifex of 20 December 1585, renewed the obligation for it and established its frequency.
Dopo secoli in cui l’usanza si era indebolita, Sisto V, con la costituzione apostolica Romanus pontifex del 20 dicembre 1585, ne rinnova l’obbligo e ne stabilisce la frequenza.