Blessed Anna Maria Katherina Scherer (31 October 1825 - 16 June 1888) was a Swiss Roman Catholic professed religious and the co-founder of the Sisters of Mercy of the Holy Cross.
She founded that order alongside the Capuchin priest Theodosius Florentini.
She was given the name of "Maria Theresia" upon her profession into her order.She was beatified on 29 October 1995.