The Deltian Library is a privately curated collection of rare and historical texts, with holdings dating back to the 16th century.

Founded by a 14-year-old bibliophile, the 'library' began humbly in the Balat district of Istanbul, where its founder acquired books from local street vendors. This early passion for preservation and literature eventually expanded across borders—first to Ottawa, Canada, and now to Amsterdam, the Netherlands—where the collection continues to grow.

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As its operations have expanded, the Deltian Library now forms a central part of the Societas Deltian Journal—an intellectual platform dedicated to the exploration and interpretation of historical objects and texts.

While many of the examined items originate from the Deltian Library itself, the journal is not strictly limited to this collection. Through detailed analysis and contextual essays, the journal aims to illuminate the historical significance of each object, fostering a deeper understanding of its heritage while touching areas of analysis, history and philosophy.