The Rotunda is the only surviving part of the 1960s Bull Ring centre, devised as a 25-storey office building in a round shape, from which it derives its name. In many ways, it was a groundbreaking and daring engineering and architectural feat when it was constructed, and because of its significance it became Grade II listed. In the 2000s, as the Bullring centre was redeveloped, the Rotunda was thoroughly refurbished into a residential tower with 232 luxury apartments. Those on floors 19 and 20 are available for short term stays via Staying Cool, who operates them. The building is not accessible to the public.