Rebuilding the American city : design and strategy for the 21st century urban core Acknowledgements Foreward Alex Krieger Professor of Urban Design Harvard University Graduate School of Design Principal NBBJ Introduction David Gamble and Patty Heyda The existing anchor institution: leveraging stability Drawing on anchor institutions to catalyze neighborhood revitalization University of Pennsylvania Pennconnects The urban river : leveraging a natural resource Re valuing underutilized waterfronts as places for living and leisure The existing urban fabric : leveraging the existing condition Building and block re use and re invention as a sustainable imperative The urban park system : leveraging underutilized land and infrastructure demonstrating commitments to urban health and public life with open space innovations The downtown district : leveraging proximities and transit Building new districts around existing ones Appendix: methodology