The article examines the evidence for identifying Roman poet Valerius Flaccus as a quindecimuir sacris faciundis, that were the fifteen members of a college with priestly duties in ancient Rome. Topics discussed include oracular communications of the Cumaean Sibyl, priestess presiding over the Apollonian oracle at Cumae, a Greek colony located near Naples, Italy; Apollonius' book 'Argonautica;' and Valerius' autobiographical book.