The underground auditorium can hold 1,000 attendees, and it’s equipped with hidden walls, a state-of-the-art projection system, and some very fancy chairs, all under a carbon fiber roof. The entire campus reportedly cost $5 billion to build.

But Apple is merely staking a claim on how the above-ground portion looks – it’s a circular building with clear glass walls, and in person, it’s reportedly stunning.

Apple filed for the patent in 2016, and lists four inventors, two in Hong Kong and two in San Francisco. It’s called “Building.”

Apple has increasingly tied the glass design and aesthetic of its stores and other real estate to its brand worldwide.