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![These photographs of the staircase in the Sintra National Palace are kindly provided by Adam Stone. The twisting string is made from separate pieces of stone that are fixed to the […]](http://stonestairs.net/wp-content/uploads/2013/01/8263880867_394027f7db_z-115x115.jpg "Sintra National Palace")
Sintra National Palace
Posted on January 6, 2013 | No CommentsThese photographs of the staircase in the Sintra National Palace are kindly provided by Adam Stone. The twisting string is made from separate pieces of stone that are fixed to the […]