On the occasion of Kenneth Frampton’s eightieth birthday, five distinguished practices based in North America came to GSAPP to discuss their work and its ongoing dialogue with Frampton’s thinking: Steven Holl Architects (New York), Rick Joy (Tucson), Patkau Architects (Vancouver), Stanley Saitowitz (San Francisco), and Shim + Sutcliffe Architects (Toronto). Essays by Frampton, as well as each of the invited practitioners, reconsider the specificity of the work within the larger North American context, taking stock of the practice of architecture on the continent today.