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  • A blind person feels with her hands a copy of "The Gentleman with his Hand on his Chest" by El Greco at The Prado Museum, Feb. 10, 2015, in Madrid. "Hoy Toca el Prado" (Touching the Prado) allows blind or vision-impaired visitors to explore with their hands the copies of six masterworks. The copies were created using a technique called "Didu," which provides texture and volume to the paintings.
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  • A blind person feels with his hands a copy of "The Parasol" by Goya at The Prado Museum, Feb. 10, 2015, in Madrid.
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  • A blind person feels with his hands a copy of "Mona Lisa" (La Gioconda) by Leonardo da Vinci at The Prado Museum, Feb. 10, 2015, in Madrid.
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  • A blind person feels with his hands a copy of "Don't Touch Me" (Noli me Tangere) by Antonio da Correggio at The Prado Museum, Feb. 10, 2015, in Madrid.
    Pablo Blazquez Dominguez/Getty Images
  • A museum visitor feels with her hands a copy of of "Apollo in the forge of Vulcan" by Diego Velazquez at The Prado Museum.
    Museo Nacional Del Prado
  • A blind person feels with her hands a copy of "Apollo in the forge of Vulcan" by Diego Velazquez at The Prado Museum, Feb. 10, 2015, in Madrid.
    Pablo Blazquez Dominguez/Getty Images
  • A blind person feels with his hands a copy of "Still life with Artichokes, Flowers and Glass Vessels" by Juan Van Der Hamen at The Prado Museum, Feb. 10, 2015, in Madrid.
    Pablo Blazquez Dominguez/Getty Images
  • A museum visitor feels with her hands a copy of "Mona Lisa" (La Gioconda) by Leonardo da Vinci at The Prado Museum.
    Museo Nacional Del Prado
  • A blind person feels with her hands a copy of "The Gentleman with his Hand on his Chest" by El Greco at The Prado Museum, Feb. 10, 2015, in Madrid.
    Pablo Blazquez Dominguez/Getty Images