Near the ancient Pyramids of Giza just outside Cairo, the Grand Egyptian Museum (GEM) is gearing up for its lavish opening on Saturday after two decades of delays.

Massive statues and historic artefacts from the country's ancient civilisation will be on display across the 24,000 square metres (258,000 square feet) of permanent exhibition space.

Here are five things to know about the long-awaited museum, which Egyptian authorities have called "the largest cultural building of the 21st century".

- The Fourth Pyramid -

An imitation of the nearby pyramids of Khufu, Khafre and Menkaure, the museum's triangular glass structure was designed by the Irish firm Heneghan Peng Architects.

The state-of-the-art complex -- dubbed the "fourth pyramid" of the Giza Plateau –- houses around 100,000 arte

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