SIENA, ITALY - APRIL 05: An original drawing on a wall dating back to the construction of the Duomo seen during the press preview of "La Porta del Cielo" on April 5, 2013 in Siena, Italy. The newly launched "Door to Heaven" from April 6th will allow visitors to enjoy a spectacular new view of the Duomo and the city of Siena (Photo by Marco Secchi/Getty Images)
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