Summary from English
Wikipedia (enwiki)
Columbus Tower was a planned high-rise development by Commercial Estates Group approved for construction on a site on the Isle of Dogs, London Borough of Tower Hamlets. The 63-storey, 242 m (794 ft) AOD (Above Ordnance Datum) tower would have been located on a 0.36-hectare site at the western end of the north dock at West India Quay. At 2009 projected cost was £450M to build and reaching 237 metres in height, and projected was taller only by 2 m than One Canada Square.