"Fasti" by Ovid is a six-book Latin poem written in AD 8. Through the voice of a poet-prophet, Ovid presents an ambitious calendar of Roman religion, documenting festivals, rituals, and their mythological origins for the first six months of the year. Left incomplete when the poet was exiled, this elegiac work blends divine interviews, multiple origin stories, and astronomical observations to preserve ancient religious traditions. Drawing on Greek and Roman poetic traditions, it offers a unique window into Roman religious practices and beliefs.