The 66-million-year-old bones of a Tyrannosaurus rex arrived today at the Smithsonian’s National Museum of Natural History, where preparations are now underway to create a dinosaur and fossil hall.

The right femur and jaw pieces from the Nation’s T. rex, discovered in 1988 by a Montana rancher, were displayed to the media this morning. The fossils were delivered by FedEx truck this morning in 16 crates.

The bones will be unpacked, cataloged, photographed and scanned (with a tool that looks a lot like an iron) by staff members in the Rex Room, which visitors can see starting today. (It will be assembled in a separate space.) The current dinosaur and fossil hall will close on April 27, and the new 31,000-square-foot space is expected to open in 2019.

The T. rex is on loan for 50 years from the Army Corps of Engineers and is one of the most complete specimens ever found, with 80 to 85 percent of the skeleton recovered. The government shutdown delayed its arrival.