Martyred c.257in Rome, Italy. According to their acts which, however, are considered apocryphal, they were Egyptians, probably brothers, in the service of Saint Eugenia; arrested for their faith, they were burned at the stake, as their charred remains found in the cemetery of Saint Hermes on the Via Salaria in 1845 indicate. The epitaph written by Pope Damasus calls them brothers. The body of Saint Hyacinth is at San Giovanni dei Fiorentini; Saint Protus is in church of the Propaganda. Feast, September 11,.