In 1998, Cal Lewis (Architect/Principal at Herbert Lewis Kruse Blunck) moderated a panel of experts who analyze the three generations of architectural responses that have gone into making the Des Moines Art Center such a significant piece of architecture. Each distinguished speaker delivered a talk and then assembled on stage for a moderated Q & A with Lewis and questions from the audience.

Franz Schulze, art historian, art critic, and Hollender Professor of Art Emeritus at Lake Forest College
Peter Papademetriou, educator, writer, and architect
Edmund N. Bacon, urban planner, architect, educator, author
I.M. Pei, world-renowned architect