Alberto Angela takes us on a very special journey to discover the most famous monument of ancient Rome: the Colosseum. For almost two thousand years its mighty mass has stood out in the panorama of Rome, and even today this exceptional construction leaves millions of visitors amazed (over 6 million in 2016) from all over the world. For the preview with Ulisse we look out from the magnificent attic of the Amphitheater with its breathtaking view which will also be open to the public from early November. How was the Colosseo built and why? This is what we discover together with Alberto Angela who tells us the stories of the three great emperors who were decisive for the construction of this wonder of antiquity. Three names that still echo today in history books: Nerone, Vespasiano and Tito.