 In 1975, the Barfüsser Church underwent a thorough renovation, during which the archaeological department of the city of Basel excavated and documented hundreds of burial sites.On 20 October 1975, workers discovered a brick-walled grave chamber in front of the choir, containing two well-preserved coffins sitting on a pile of bones.The upper coffin contained the skeleton of a female while the smaller coffin beneath contained the completely mummified corpse of a woman, who would later be known as the "Lady/Mummy of the Barfüsser Church."