The AJ has learned that Renzo Piano is set to undertake the design of a skyscraper around 300m high on a sensitive site in New York.
The Italian architect is understood to have been commissioned to design the 'long, slender, residential tower' on Park Avenue, Manhattan.
Details are still very vague, but this height is likely to put the new tower at roughly 80-90 storeys.
This scale will trigger widespread interest - and most likely controversy - for the designer of London's Shard of Glass, as it is much higher than any surrounding buildings.
This includes Mies Van Der Rohe's world-famous Seagram building, which at 157m tall would be dramatically dwarfed by the new scheme. The tallest building on Park Avenue currently is 44 storeys and 175m tall.
No more details of the Renzo scheme are yet available, but it is believed that design work is about to get under way.by Ed Dorrell