Diane Marie "Mimi" Lange, of Plano, Texas, died May 12th 2017 at the age of 84 years. She was born February 7th 1933 in Oak Park, Illinois. Her parents were Oscar Carl Olson and Margaret Olson. Diane graduated from Kelvyn Park High School in Chicago and Valparaiso University in Indiana with a B.A. degree in 1955. She met Donald Edward Lange at Valparaiso University and, on June 9th 1956, they were married at Immanuel Lutheran Church in Crystal Lake, Illinois. They shared 60 years of marriage. Mrs. Lange taught elementary school for four years and then became a homemaker and did substitute teaching. Prior to living in Plano, Texas the Langes lived in Huntley, Illinois. They also lived previously in Grosse Pointe Farms, Michigan and Elk Grove Village, Illinois. Diane Marie "Mimi" Lange is survived by her husband, Don, two children; Kristen of Shreveport, Louisiana, and Garrett and his wife, Arlyna, of Plano, Texas, four grandchildren; Michael, Nickolas, Nicole, and Sierra, and three great grandchildren. She is preceded in death by her brother, John "Jack" Olson, and her twin brother, Tom Olson. Diane will be laid to rest at the Mount Emblem Cemetery in Elmhurst, Illinois. Arrangements are under the direction of: ARIA Cremation Service & Funeral Home 19310 Preston Road, Dallas, Texas 75252 214-306-6700