The body of an apparently wealthy woman was found decades ago during renovations on the Barfuesser Church in the Swiss city. There was no gravestone, and her identity was a mystery.
Basel's Natural History Museum says its experts led an international team that identified her. The results will be shown on Swiss television today.
The BBC says DNA extracted from the mummy's toe has revealed she is Anna Catharina Bischoff, a member of a prominent Basel family who died in 1787.