 OPUS holds over 15,000 slides utilized by Marija Gimbutas in her lectures and books on Neolithic civilizations and the goddess, thousands of research catalogue cards in numerous languages handwritten by Gimbutas, and extensive texts on the subjects of history, archaeology, and the humanities.James Hillman's collection includes first draft manuscripts of his books, including "Re-Visioning Psychology", which earned him a nomination for the Pulitzer Prize.Hillman's prolific career is documented through correspondence, personal notes, and unfinished projects that are available for pursuit by scholars of the next generation.