ante diem iii idus octobres

• Fontinalia — a festival in honour of the divinity Fons, who presided over springs and wells; such sources of water were festooned with garlands for the occasion
• 54 A.D. — death of the emperor Claudius, purportedly succumbing to a plate of poisoned mushrooms dished up by his niece/wife Agrippina; dies imperii of Nero (son of Agrippina)