John Hejduk, one of the most original architects in the United States, succumbed to cancer on July 3. Until June he was dean of the Irwin S. Chanin School of Architecture at the Cooper Union for the Advancement of Science and Art in New York. He was known more for his visionary works of architecture on paper and his influence on graduates of Cooper Union—such architects as Daniel Libeskind and Elizabeth Diller—than his built work—such as the interior of Cooper's building at Astor Square in New York City.