What stone, still quarried in the Dorset (England) tied island which also bears its name, was used in the construction of St Paul's Cathedral and Buckingham Palace, and widely elsewhere too?
Portland Stone Portland stone Independent & Admiralty Quarries Jordans quarry Portland limestone Portland Limestone Jordans Quarry Roach Stone
jordans quarry portland stone independent admiralty quarries portland limestone roach stone
portland stone
WikipediaEntity
Portland stone