Throughout 2018, three McGill Library units collaborated to put over 180 archival finding aids online and expand their discoverability beyond McGill’s systems through Wikidata. With funding from Young Canada Works, the McGill University Archives (MUA), with McGill’s Digital Initiatives and Collection Services units, migrated metadata from archival descriptions that were not yet available online to its recently-launched AtoM-based database, the McGill Archival Collections Catalogue (ACAM). The new platform allows for better visibility of MUA collections to facilitate research and teaching. The project then went a step further to map the newly-updated finding aids to Wikidata and systematically add fonds-level archival metadata to Wikidata, the community-edited knowledgebase of open and structured data created by the Wikimedia foundation.