Columbia Documents of Architecture and Theory, more colloquially known as D, was a biannual journal that compiled selected material from lectures, conferences, and other forms of discourse that took place at Columbia GSAPP. Its focus was generally theoretical, seeking to explore architecture’s engagement with culture and history and to invite leading theorists and practitioners to question the context in which the practice of architecture occurs.

The fourth volume of D includes discussions of projects by Jacques Herzog, Steven Holl, Arata Isozaki, and Hans Hollein; essays by Kenneth Frampton, Andrew Benjamin, and Elliot Feingold; and a roundtable discussion about the publication of Architecture Culture 1943–1968.