The Vortex Tower was the working name of a London skyscraper design by Make Architects, a London-based business headed by Ken Shuttleworth.
The structure would have twisted into a spiral shape with a tapering centre and wide base.
The project was based on a different concept, with rotation enabling the use of leaning columns as straight structural elements of hyperboloid.
Shuttleworth expressed surprise when the design was compared to that of the similar Kobe Port Tower, built in Japan in 1963.
and noted that the Kobe designers "did not use the full envelope of the building", and that the towers would be different colours.