This subseries currently is closed to researchers. File titles are subject to change when processing is finalized at a later date.

In this subseries documentation about the Museum's anniversary campaign and long-term planning continues. Again, as subsets to the "Development Department" records are "125th Anniversary Celebration" files as well as files reflecting the finalized campaign title, the "2001 Fund." The subset of celebration folders pertain to the planning of the special events held on May 10, 2001. On that date, 125 years earlier, the Centennial exhibition opened to the world. Among its many attractions was the Art Gallery building, which was later named Memorial Hall. At the close of the exhibition, Memorial Hall became the first home of the newly chartered Philadelphia Museum of Art (then known as the Pennsylvania Museum and School of Industrial Art). The 2001 events marking the occasion included a ceremony at Memorial Hall followed by a black-tie reception at the Museum's main building. Guests invited included local and state officials as well as ambassadors from the countries that participated in the 1876 Centennial fair. There are also a number of "Long Range Planning" files. More than 20 "Ruth and Raymond G. Perelman Building" files continue to track the Museum's progress on its plans to renovate and expand the former insurance building to accommodate an expanded library and archives, offices and additional gallery space.

Also of note are d'Harnoncourt's files pertaining to the Museum's participation in an international forum at this particular time when museums were dealing with increased calls for repatriation of objects long held in their collections. The "IEOC" files pertain to the International Exhibition Organizers Conferences, which were sponsored by the International Group of Organizers of Large-scale Exhibitions. There are also several folders pertaining to the group's founder, Irène Bizot, with whom d'Harnoncourt corresponded throughout her career. Another international organization documented here and in earlier subseries is "ICOM," the International Council of Museums.