Nov. 1 (UPI) -- The Grand Egyptian Museum in Giza, Egypt, is one of the world's largest and opened on Saturday after decades of delays and a cost of more than $1 billion.

The 5 million-square-foot museum features exhibits and artifacts ranging across 7,000 years, from prehistory to about 400 A.D., according to CBS News.

It also is the world's only museum that is dedicated to one culture, which is ancient Egypt.

"It's a great day for Egypt and for humanity," Nevine El-Aref told CBS News. "This is Egypt's gift to the world."

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