CODICUM is an ambitious, multi-disciplinary research project that explores the rich world of medieval manuscript fragments in Northern Europe (c. 1000-1500). These often overlooked pieces of parchment offer an unparalleled window into the literary culture, craftsmanship, and interconnected knowledge networks that shaped the region and linked it to Europe. Through a combination of traditional manuscript studies, cutting-edge scientific analysis, and innovative digital techniques, CODICUM aims to reconstruct lost books, chart the flow of ideas, and reveal the hidden histories of this fascinating era.