Walter Noll's leadership was central to recent progress in setting the mathematical foundations of continuum physics. In this volume his life and contributions are revisited in an extensive essay that includes a complete list of his research contributions, and the conceptual tools that he provided are put in evidence in original articles pointing to the continuing vitality of his legacy. The volume will appeal to readers with an interest in the many-faceted role that mathematics can play in the advancement of continuum theories of material behavior.