The Colosseum was built in 8 years, from 72 to 80 A.D. using thousands of slaves. It could host up to 60,000 people and the emperor Titus, in the year of its inauguration, declared 100 days of national holidays. 100,000 tons of marble have been used together with 300 tons of iron to cement the blocks. It's 5o meters high and 188 meters long and what we see today is just 1/3 of what it was in the past...
