Mystery AtlasCallahan-Smith Infrared Study of the Tilma (1979-81)
An infrared photographic examination of the Guadalupe tilma conducted on the night of 7 May 1979 by biophysicist Philip Callahan and researcher Jody Brant Smith, published in 1981, reporting no underdrawing or brushwork beneath the original figure but confirming later human additions to other parts of the image.
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Theories & Explanations
Callahan-Smith Infrared Study of the Tilma (1979-81) contradicts Tilma Human-Painted-Image Theory — The absence of visible underdrawing or brushwork is cited by defenders of the traditional account against straightforward human painting, though the study did not test every possible natural production method.
Objects & Artifacts
- Juan Diego's Tilma (Our Lady of Guadalupe)December 1531
Callahan-Smith Infrared Study of the Tilma (1979-81) was used to analyse Juan Diego's Tilma (Our Lady of Guadalupe) — Found no underdrawing or brushwork beneath the original figure, but confirmed the crown, rays, moon, and an added angel were later human touch-ups.