The Great Pyramids of Giza, Egypt are dedicated to the following pharaohs - Khufu, Khafre, and Menkaure, which means that the odd one out is Tutankhamen.
So these pyramids weren't dedicated to Tutankhamen. They are considered to be one of the Seven Wonders of the Ancient World, and were built sometime in the 3rd century BC. It is the oldest of these wonders, and still remains largely intact.