Watch Horrible Histories: The Movie - Rotten Romans (2019) HD Full Movie Free on SolarMovie. Watch Horrible Histories: The Movie - Rotten Romans (2019) online free. Atti, a smart and quick-witted Roman teenager, manages to upset Emperor Nero with one of his schemes...Atti, a smart and quick-witted Roman teenager, manages to upset Emperor Nero with one of his schemes. For punishment, Atti is sent to work in a cold and wet Britain where he also meets the Celts.