There were 21 triumphal arches in ancient Rome. There are only 3 triumphal arches in modern Rome. Constantine triumphal arch is one of them. It has a history of more than 1,000 years. Napoleon came to Rome that year and saw the Arc de Triomphe. He greatly appreciated it. Then he built the Arc de Triomphe in Paris based on it. So it is the Arc de Triomphe in Paris. Grandpa?