Modern history and culture of Western countries are closely connected with the Roman Empire. The Romans left us a legacy of the art of paving roads and building illuminated tunnels, fountains and sewers, ancient mythology and festive ceremonies, Roman law, oratory and Latin, the language of scientists and theologians from ancient times to the present day. How one of the greatest empires was created in history? How was a small trading city on the Tiber River able to become the center and ruler of the ecumene? What is the secret of the legendary invincibility of the Roman legions? How was the management system of the Roman Empire created, which became a model for many modern government institutions?