Born in St. Louis, Sister Mary entered the Sisters of St. Joseph of Carondelet in 1948 and was received into the novitiate as Sister Regina Agnes in 1949. She earned a bachelor’s degree in history from Fontbonne College in 1959 and a master’s degree in history/modern Europe from Saint Louis University in 1963.

Sister Mary served in elementary education her first 20 years, teaching at St. Mary Magdalen School in St. Louis, 1951-52; Notre Dame de Lourdes in Wellston, 1952-56; St. Jude in Overland, 1956-60; and at All Saints in University City, 1960-62. She was a principal and teacher at St. Edward School in St. Louis, 1962-64; St. Matthew in St. Louis, 1964-66 and Sts. Mary and Joseph in St. Louis, 1966-71. She then taught and was an administrator at St. Louis Cathedral School in St. Louis from 1970-72.

For 33 years, from 1972 to 2005, Sister Mary Adelaide served as a pastoral minister at Sts. Mary and Joseph Parish. While there, from 1980 to 1990, she was also the religious education coordinator. She then served as the receptionist at St. John the Baptist Parish in St. Louis for six years.

Sister Mary Adelaide retired in 2013. She resided at Nazareth Living Center in St. Louis.

Funeral arrangements are pending.