Denarius of the Roman Emperor Vitellius, silver coin struck in Rome between April and December of the year 69. The reverse legend is an abbreviation of Quindecimviri Sacris Faciundis, a title referring to a college of fifteen priests (quindecimviri) responsible for overseeing sacred rites, notably the custody and interpretation of the Sibylline Books—prophetic texts consulted in times of crisis.
