Standing at an impressive 400 metres in height, the cube shaped building will be large enough to hold 20 Empire State Buildings.

Saudi Arabia has officially began construction on the 'Mukaab' project - a 1,300-foot tall cube-shaped skyscraper, which would be the largest building in the world, once completed. The gigantic monolithic structure will be the centerpiece of the ambitious New Murabba development in northwest Riyadh spread over 11 kilometers.

Excavation at the iconic Mukaab supertall skyscraper, which will be the tallest building after completion, has reached 86% completion.

The world's biggest skyscraper, the Mukaab tower, is being built in Riyadh, Saudi Arabia, which will be 1,300 feet tall and almost as wide while also boasting amazing technology

The world’s soon-to-be largest building has officially broken ground.

It’s masquerading as a building today, but it’s so much more,” said Michael Dyke, chief executive officer of the project.

Construction has begun on the 400-metre-high, cube-shaped Mukaab supertall skyscraper in Riyadh designed by AtkinsRéalis, which will be the world's largest building when it completes.

It’s an out-of-the-box undertaking. Ground has officially been broken in Saudi Arabia for what is expected to be the “world’s largest building.” The ambitious, $50 billion project — called

Saudi Arabia began constructing The Mukaab, a 400-metre cube building in Riyadh, aimed to be the world's largest.