Mary Charlotte (Barber) Hartz, age 89, of Pleasant Hill, passed away May 7, 2020. She is survived by her husband: George Frederick Hartz; children: Maryjane Hartz (Don) Westra, John Steven (Karen) Hartz, and Martha Marie Hartz; grandchildren: Evan Joshua Westra, Jacob Margason, Kristina Reyes Allen, Jacob “Glen” Westra, Lucas Paul Westra, Mary Johanna Westra and Vanessa May Ramirez Westra, Robert Theodore Hartz; step-grandchildren: Tanya and Joshua Colvin; 12 great-grandchildren; and one soon-to-be born great-great-grandchild. Mary’s body has been donated to the Vanderbilt Medical School. A service of memory will be held at George’s home in Pleasant Hill with Rev. Don Smith officiating. Face covering masks will be required and distancing will be observed because of the coronavirus pandemic.