The obelisks sounded hard to build. They were made of pink granite from the mine in Aswan. Oh, and I forgot to tell you. The obelisks are 1 piece! Do you want to know how they did it? Well, they were pounded out with 12 pound diorite balls! You would not want to be a worker making an obelisk. Swinging a 12 pound ball all day is not an easy task. Then they would pound out caves under the obelisk. Next, they would load the obelisk on a barge down the Nile. Once it got to its destination they lifted it up. Nobody knows how the lifted them but it probably took hundreds of people.