Answer:
Unlike earlier Greek theatres that were built into hillsides, the Colosseum is an entirely free-standing structure. It derives its basic exterior and interior architecture from that of two Roman theatres back to back. ... The remainder of the present-day exterior of the Colosseum is in fact the original interior wall.
They needed sober, responsible workers
Through the 1920s, Britain's economy was already struggling to pay for the effects of World War I. Then, in 1929, the US stock market crashed. ... The value of British exports halved, plunging its industrial areas into poverty: by the end of 1930, unemployment more than doubled to 20 per cent.