dec 22, 70 - 70 A.D. :
The construction of the Coloseum began.
The decision which led to building the Colosseum was made by the Vespasian who was emperor of Rome from 1 July 69 – 23 June 79 AD.
Added to timeline:
Ancient Roman History
Roman Empire from 500 B.C. - 500 A.D.