BVM Sister Mary K. (Jean Catherine) O’Brien, 84, died Nov. 27 in Dubuque, Iowa.

In the Archdiocese of Chicago, Sister Mary K. taught at St. Ferdinand, where she was also principal; St. Dorothy; and St. Gilbert, Grayslake. She was principal at St. Francis Xavier, Wilmette and served as a resource person at St. Margaret Mary. She also taught in Iowa and New York.

Born in Chicago, she entered the BVM congregation in 1951 from Our Lady of Angels Parish, and she professed final vows in 1959.

She is survived by a brother, John O’Brien, and a sister, Margaret Connolly.