During Numa's reign, the Gates of Janus were closed as Rome was at peace. The next king, Tullus Hostilius, opened the Gates of Janus when he went to war with Alba Longa. The Gates of Janus remained open for the next 400 years until after the First Punic War when A. Manlius Torquatus closed the Gates of Janus in 241 BC. War with the Gauls in Northern Italy forced the Gates of Janus to reopen. They did not close again until 29 BC, following the deaths of Antony and Cleopatra.