Long ago, after a leader named Emperor Nero died, Rome was in a big mess because many people wanted to be in charge. But then, a strong and important general named Vespasian became the new Emperor. He was not born rich or fancy, but he had lots of soldiers who liked him and helped him.

Emperor Vespasian thought the people of Rome needed a huge stadium for fun and games, so he built one using special curved shapes and strong materials called arches and concrete. This stadium was really tall and was called the Colosseum, which means "giant."

In the Colosseum, there were exciting fights between brave gladiators who battled each other or wild animals. Sometimes, they even filled the stadium with water to have boat races! The people of Rome loved watching these games during holidays and it made the Emperor very powerful and liked by everyone.

Even today, one side of the Colosseum is a bit broken because of earthquakes and fire, but it is still the most famous and special building in Rome.