A mummy of an Egyptian woman dating back to 700 A.D. has been scanned and stripped to reveal a tattoo on her thigh that displays the name of the biblical archangel Michael.

The discovery, announced by researchers at the British Museum over the weekend, was made during a research project that used advanced medical scans, including Computed Tomography (CT) images, to examine Egyptian mummies at a number of hospitals in the United Kingdom last year.

The woman’s body was wrapped in a woolen and linen cloth before burial, and her remains were mummified in the desert heat. As deciphered by curators, the tattoo on her thigh, written in ancient Greek, reads Μιχαήλ, transliterated as M-I-X-A-H-A, or Michael....