Could ancient earthquake explain Shroud of Turin?

[rug]

61. Has RationalWiki let me down yet again?

One proposed hypothesis is that Leonardo da Vinci was commissioned to replace an earlier version of the Shroud of Turin that was exposed as a poor fake, which had been bought by the Savoy family in 1453 only to disappear for 50 years. Da Vinci created a "new" Shroud of Turin using a camera obscura technique involving a mirror and lens, on cloth impregnated with silver sulphate in a darkened room. The silver sulphate acted as a negative which propagated an image onto the cloth when exposed by light through the lens. Silver sulphate and the camera obscura technique were known in the 15th century. In January 2009, visual arts consultant Lillian Schwartz at the School of Visual Arts in New York.

http://rationalwiki.org/wiki/Shroud_of_Turin