PARIS (AP) — The world’s biggest triceratops skeleton, known as “Big John,” has been sold for 6.6 million euros ($7.7 million) to a private collector at a Paris auction house. The enormous skeleton, estimated to be over 66 million years old, was found in 2014 in South Dakota. The triceratops is known for its three horns on the head. Big John, named after the owner of the land where it was found, is certified by the Guinness World Records as the largest documented skeleton of a triceratops. The dinosaur’s skeleton is more than 60% complete and its skull more than 75% complete, making it unique. Big John is sold to an private U.S. buyer who requested to remain anonymous.