This collection of records document the professional and personal life of Wm. Theodore de Bary (1919-2017), the renowned scholar, educator, and university administrator who studied and served over decades at Columbia University. Types of files in this collection range from administrative files, correspondences, manuscripts, references, photographs, and audio-visual materials. The available materials showcase the different roles that de Bary had held in researching and scholarship-building, teaching, and administering.