Question for Goldman: How many people lived in Rome when the Colosseum was active as an arena? ~Angie Answer: Estimates vary, but the most reliable sources, based on the number of houses and ...

Concrete is ubiquitous in our modern world, forming the backbone of buildings, bridges, and infrastructure. Its history stretches back millennia, with techniques lost and rediscovered over time. From ...

Originally known as the Flavian Amphitheater, the Colosseum began construction between 70 and 72 C.E. under Rome's most ...

Explore a plan of the Colosseum to investigate six key areas. Each shows an aspect of the sophisticated technology and planning that lie behind this incredible structure.