Is the roman coliseum is still going on today?
No. The Roman Coliseum has been in ruins for centuries. Part of it was toppled by an earthquake in the Middle Ages and never rebuilt. The floor of the arena is long gone, and repairs would be needed before an event could be held there again. Some of the smaller Roman amphitheaters are still used for soccer games today, and bullfights in Spain and Portugal. [In Spain the bull is killed, in Portugal it is not.] And there are reenactors who stage gladiatorial games today, but never to the death as was often done in Roman times.