Ancient Rome was founded around 753 BC by the brothers Romulus and Remus and grew to become one of the most powerful empires in history. It started as a small town but became a large marketplace and melting pot of cultures as Greek and Etruscan people migrated there. Rome was originally ruled by kings but became a republic with elected magistrates around 500 BC. It expanded through military conquests across Europe, Africa and Asia. Julius Caesar took total power as a dictator in the 1st century BC, ending the republic. His heir Augustus became Rome's first emperor, beginning the imperial period that lasted until the Western empire fell to invasions in 476 AD.