Mercy Sister Patricia Illing, 90, died Dec. 18.

Born in Milwaukee, she entered the Sisters of Mercy in 1945.

During her 72 years as a Sister of Mercy, Sister Pat was an educator in Illinois and Wisconsin, at many grade schools as well as at McAuley High School, Mercy/Unity High School and several community colleges in Chicago. She also founded and served as director of a day care center and was a co-director of the McAuley Little School until becoming archivist for the Sisters of Mercy Chicago Regional Community, which she did until her retirement in 2000.