In Xian, we went to see the Terra Cotta Warriors. They are called the Terra Cotta Warriors because they are made of clay. They think that there are 20,000 of them! The museum was very hot and very big. It looked like a giant hotel. Just when you think that you have seen everything in the building, you realize that there are three more buildings just like it. The warriors were found by a farmer. They were underground and he found them when he was digging a well. There are so many warriors buried underground because the Emperor thought that if when he died, he would be protected and no one would mess with him.