As emperor , he is best known for completing the Colosseum and for his generosity in relieving the suffering caused by two disasters , the eruption of Mount Vesuvius in AD 79 and a fire in Rome in 80 .
As emperor , he is best known for completing the Colosseum and for his generosity in relieving the suffering caused by two disasters , the Mount Vesuvius eruption of 79 and a fire in Rome in 80 .