The Congregation of the Sisters of Our Lady of Mercy (
Congregatio Sororum Beatae Mariae Misericordiae (
lat)), (
Zgromadzenie Sióstr Matki Bozej Milosierdzia (
pol)) - was founded by Mother Teresa Eva Potocka (1814–1881) in
Warsaw, Poland on November 1, 1862. This was the first "Mercy House". The order uses the abbreviation
O.L.M.