I'm attaching this Powerpoint slideshow, which was sent to me recently. I'd heard some of this info before and am not sure how much can be vouched for. Even the entry at wikipedia indicates that we have, here, a truly amazing relic.

You'll need Powerpoint to view the slideshow. If you don't have that, you can download Open Office or Neo Office from versiontracker.com and the presentation program should open it OK.

LA_VIERGE_MARIA_DE_GUADALUPE.pps (702 KB, 25 downloads) Our Lady of Guadalupe