In 1965, Diana started her philosophy studies at L’ecole des Lettres in Beirut. She then Co-founded ABC Department Stores, with late husband Mr Maurice Fadel, in 1972. During the Lebanese civil war in 1975, she moved to Paris with her family where she continued her studies at Paris X Nanterre university from which she graduated in 1988. 10 years later, Diana created Monuments en Musique, in an effort to preserve and salvage important and often abandoned Lebanese heritage and iconic sites, which went on from 1998 to 2008 through 45 variously themed music concerts. After struggling against disease from 2010 to 2013, Diana went on and founded the Diane Foundation in 2015, which she currently heads as president.