King Tut's treasures haven't been all together in more than a century. Until now.

Ancient treasures belonging to pharoah Tutankhamun will go on display at the Grand Egyptian museum which holds its opening ceremony Saturday.

GIZA, Egypt — They’re the crown jewels of the Grand Egyptian Museum — two galleries devoted to the ancient pharaoh Tutankhamun.

Showcasing more than 5,300 objects from the young king’s tomb, including his iconic death mask and glittering royal regalia, the new section of the vast museum here on the outskirts of Cairo is expected to draw millions of visitors every year. The galleries, displaying mostly pieces never seen by the public, will hold its grand opening ceremony on Saturday.

Details about the event are a closely guarded secret, but on a behind-the-scenes visit to the museum’s Conservation Center earlier this month, general director Hussein Kamal told NBC News that it will be the first time since Tutankhamun's tomb was discovered over a century ago that all the items are stored in one place.

“It’s wonderful,” he said, adding that he was particularly excited by the exhibition featuring King Tut’s armor. The piece made from textiles and leather was “unique throughout ancient Egyptian civilization,” he said.

The Grand Egyptian Museum.Charlene Gubash / NBC NewsRestoration work in the Conservation Center of the Grand Egyptian Museum.Charlene Gubash / NBC NewsKamal said the items, previously held in a storeroom, were painstakingly restored since 2017 by some of the center’s 150 conservators.