An Emperor's Guide

I am a Roman emperor, and my empire stretches from the sunny Mediterranean to northern Europe. I can tell that you're impressed. Here are some rules I follow to keep everything under control. It is my right to banish traitors to freezing Britain, I will conquer lands to gain riches-and more people to pay taxes and work for me. My buildings must be beautifully made with the best materials, And by the way, I'm pretty generous. I declare public holidays and allow my people to watch gladiator fights. You must agree, this is a brilliant plan to keep my empire strong. What could possibly go wrong?