Five centuries of footsteps have deformed the marble of the stairs in the Leaning Tower of Pisa.

Five centuries of footsteps have deformed the marble of the stairs in the Leaning Tower of Pisa.

Five centuries of footsteps have deformed the marble of the stairs in the Leaning Tower of Pisa.

#leaning tower of pisa    #staircases    #marble    #erosion    
Source Link  via  Macrocosmic Minutia
Macrocosmic Minutiatumblr @ mandaladana
Thu, 17 Sep 2020 23:53:14