Veneration of the two martyrs in the Church of Rome dates to venerable antiquity. Ancient registers contain their names, Pope Damasus praises them in verse at the end of the age of martyrs. The cemetery of Basilla marked the site of their graves; relics of St. Hyacinth were discovered there in 1845 and now are honored in the chapel of the Propaganda.
May the glorious profession of faith of Your blessed martyrs Protus and Hyacinth strengthen us,
O Lord, and may the power of their intercession shield us. Through our Lord . . .