A diplodocus skeleton sold at a Billingshurst auction for £400,000 to an unnamed buyer was bought by the Natural History Museum of Denmark, it has emerged.
The 17m-long (56ft) female dinosaur nicknamed Misty, which was found in a quarry in The United States, assembled in Rotterdam, and auctioned last month.
It is thought to be one of only six near-complete specimens in the world.
Mystery had surrounded the buyer, but the Denmark museum confirmed on Tuesday it had acquired the skeleton.
The museum bought the female dinosaur, nicknamed Misty, for £400,000 ($652,000), following a donation from the Obel Family Foundation.
Director Morten Meldgaard said: “To own a giant dinosaur is, of course, the dream of any natural history museum.
“In order to understand the nature and the world we live in, we have to understand the past. And more than anything else, a dinosaur is an object that connects us with the distant past.”
The dinosaur would have roamed Earth more than 150 million years ago.
It was found almost completely intact in 2009 by the sons of palaeontologist Raimund Albersdoerfer.
Mr Albersdoerfer had been taking part in an excavation at the Wyoming quarry when he sent his teenage sons to dig in an area nearby “to get them off his back”.
But the two brothers uncovered a dinosaur bone. The find led to a team digging out Misty nine weeks later.