I want to know the answer to the following question:
What ancient festival was celebrated until the 5th century?
All the background I'm provided with is that "Rome had a semi-divine ancestor in the Trojan refugee Aeneas, son of Venus, who was said to have established the nucleus of Roman religion when he brought the Palladium, Lares and Penates from Troy to Italy.". Is that enough to answer the question?
Answer: no