Designed by Fosters + Partners, the donut-shaped building will serve as the new headquarters for the US tech juggernaut. The Apple Campus 2 will house over 13,000 employees inside a four-story circular building that measures almost a mile in circumference. The structure is so big that’ll require nearly four miles of glass windows and can fit the footprint of the Pentagon, one of the world’s largest office buildings, inside the central courtyard.

Related: Tim Cook Says Apple’s New Spaceship Campus Will be the “Greenest Building on the Planet”

Sinfield’s video opens with clips of Steve Jobs introducing the 150-acre project in a 2011 Cupertino City Council meeting. Jobs’ commentary is used as a voiceover in the new drone footage, which shows the construction site and zooms in on the nearly completed building foundations and underground floors. The movie pans over multiple sections of the site, with captions that identify features of the construction landscape such as the on-site cement plant, auditorium, and 300,000-square-foot R&D facilities. Aerial videos taken on August 1, 2015 have been overlaid on the new footage to show the progress made in the last month.

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Sinfield’s latest construction update is part of his monthly drone video series of the campus. The Apple Campus 2 is slate for completion in 2016.

+ Apple

Via The Verge

Images via Youtube/Duncan Sinfield