An opportunity for visitors to see inside Cliveden’s Octagon Temple, originally built for the Earl of Orkney as a tea-room and converted to a Chapel by William Waldorf Astor. An opportunity for visitors to see inside Cliveden’s Octagon Temple, originally built for the Earl of Orkney as a tea-room and converted to a Chapel by William Waldorf Astor. Please note that the Chapel is open dependent on volunteer availability and weather (due to conservation constraints). Booking Not Needed.