WASHINGTON, DC (WUSA9) -- Visitors have been packing into the popular dinosaur and fossil exhibit at the National Museum of Natural History before it closes Sunday. The Dino and Fossil Hall won't reopen for five years.
The museum is undergoing a major renovation to make room for its centerpiece that arrived earlier this month: The Nation's T-Rex.
Jen Kelley, from Boston said, "I was just explaining to my daughter she gets to experience this. By the time she comes back she'll be more grown up and older. It's really cool to see these dinosaurs."
Dewaune Allen, out of Springfield,Va. said, "I wanted them to see this before it closed down while they're still young."
The museum will undergo a massive renovation to make room for a newly delivered skeleton of a Tyrannosaurus rex. It is one of the largest and most complete of its kind ever discovered and is dubbed the 'Nation's T-Rex.'
The 66-million-year old bones arrived in crates at the Smithsonian earlier in April.
The T-rex skeleton will be on public display in 2015.
Kelley said, "Knowing that it's going to be closed makes it more wonderful because we wouldn't be able to see this especially where we're from."
You'll still be able to get your dinosaur fix because there will be three exhibits that will be open in the interim where visitors can watch staff members unpack, catalog and take 3-D scans of the Nation's T-Rex.
Amy Davis brought her daughter to the museum from Delaware.
Amy Davis said, "she would've normally gone on a school trip but they canceled the 5th grade trip this year so we decided to take her down."
Taylor Davis, an 11-year-old said, "I don't know why I like dinosaurs so much I like history in general and everything revolves around history. We wouldn't be here today without the past."
The T-Rex is on loan for 50 years, a short time compared to the age of these Jurassic fossils.
A Montana rancher discovered the T-rex in 1988.