The fort is square and on every corner there is a cylindrical tower.

That is, for a period Jupiter seems to move backward in the night sky, performing a looping motion.

The design of the Skylon C2 features a large cylindrical payload bay, long and in diameter.

It's made of clay, and it's been fashioned into a cylinder shape, covered with close writing and then baked dry in the sun.

It has five sides, five floors above ground, two basement levels, and five ring corridors per floor with a total of of corridors.

The tower takes the form of nine cylindrical buildings stacked atop each other, totalling 121 floors, all enclosed by the inner layer of the glass façade.