This design is for a 220+ floor City in a Building, capable of housing and working up to a half-million people.

This design incorporates 24 pillars with an interior outdoor courtyard with 314sq meters of space. The complete roof structure is supported by the 24 free-standing 1.2m x 4m x 7m pillars. The end of the roofs may contain cable stays to support the roof.

This is a rather larger Dome. I used the profile from a surplus air form from monolithic domes. The dome is 110 ft by 45ft. I split it in half and filled in an area between them to extend the length by 40 meters.