Cantilevered marble and stone staircases have been used in the grandest of buildings and houses since the mid 1500's. Andrea Palladio was so passionate about them that he designed the entrance hall of every villa around this type of stone staircase.
During the early Georgian period, architects and stone masons worked to make the waist of the staircase as thin as possible by introduing a rebated joint between each step, known as the pien joint. The Tulip staircase at the Queen's House is possibility the earliest example (credited to the architect Inigo Jones and stone mason Nicholas Stone) of this type of rebate which gave the staircases a much more elegant and lighter look.
Mark Antony Stone have been designing and manufacturing cantilevered marble and stone staircases since 2004.