Vatican Museum staircase cc.jpeg

Double helix staircase in the Pio Clementino Museum at the Vatican, designed by Giuseppe Momo, sculpted by Antonio Maraini and realized by the Ferdinando Marinelli Artistic Foundry in 1932, pictured in 2004 (Wikimedia Commons/Andreas Tille)
Double helix staircase in the Pio Clementino Museum at the Vatican, designed by Giuseppe Momo, sculpted by Antonio Maraini and realized by the Ferdinando Marinelli Artistic Foundry in 1932, pictured in 2004 (Wikimedia Commons/Andreas Tille)