MCKG: A Community-Driven Knowledge Graph on Medieval Charters

Medieval charters serve as essential primary sources for understanding medieval societies, yet their analysis remains a labor-intensive process reliant on domain experts, leaving large digitized collections largely unexplored. To address this challenge, we present a Wikibase-based Medieval Charters Community-Driven Knowledge Graph (MCKG) that combines expert annotations with community contributions through a provenance-aware framework, ensuring data quality while enabling scalable data integration. Our solution features a hybrid data model that combines elements from CIDOC-CRM and the Wikidata data model to capture the complex legal, social, and biographical relationships in medieval charters. A standardized pipeline enables efficient corpus integration into the MCKG. We demonstrate this approach's effectiveness by populating the MCKG with a corpus of Spanish medieval charters using our integration pipeline, and resolving interdisciplinary, SPARQL-based competency questions, showcasing its research value for historical studies.