Portugal sits on the Western edge of Europe, and has had humans living in its valleys and shores for 400,000 years. From the prehistoric to Art Deco, Portugal has all kinds of monuments to explore. The Roman and Moors both ruled ancient Portugal for centuries – their touch is unmistaken. But what about other ancient people who came, and saw, and conquered? Their presence is a bit harder to find, but excavations and discoveries in recent decades have cast more light on the ancient invaders of Portugal.