**Please note that the *Valuing the City* symposium scheduled for this Friday has been changed to a virtual-only event.** This full-day symposium is organized on the occasion of the publication of [*Built Up: An Historical Perspective on the Contemporary Principles and Practices of Real Estate Development*](https://www.routledge.com/Built-Up-An-Historical-Perspective-on-the-Contemporary-Principles-and-Practices/Derrington/p/book/9780367699949) (Routledge, 2021) by **Patrice Derrington**, Holliday Associate Professor and Director of the M.S. in Real Estate Development Program at Columbia GSAPP. Organized by the GSAPP M.S.RED program in partnership with symposium co-chairs **Gordon L Clark**, Professorial Fellow at St Edmund Hall at Oxford University, and **Richard Florida**, University Professor, University of Toronto.