The Eranos Library, located in the historical Gabriella House, includes about 20’000 volumes. It was firstly created thanks to Olga Fröbe-Kapteyn’s donation of her own library to the Foundation. It gradually grew up thanks to subsequent gifts and purchases. The Library became an organic and unique collection, crossing areas of knowledge such as depth psychology, history of religions, philosophy, anthropology, ethnology, archaeology, Eastern studies, history of Eastern and Western mysticism and esotericism, German, English, French, and Italian literature, musicology, history of art, as well as natural sciences. Currently, it still represents a reference point for scholars from different disciplines and nationalities. In particular, its catalogue includes:

• Eranos Yearbooks series (75 volumes in each series, from 1933 till 2018)
• Scientific books mainly published in the 19th and 20th centuries
• Antique books, published before the 19th century
• Collections of learned journals
• Rare typescripts of C. G. Jung’s seminars, originally distributed among his students
• Books with authors’ handwritten dedications
• Books with previous owners’ handwritten notes (e.g., Olga Fröbe-Kapteyn, Adolf Portmann, Alwine von Keller, Emma Hélène von Pelet-Narbonne)