Léon Gérard Hubert Baron Janssen

Data sources

Location records are drawn from open, licence-clean datasets, kept here with attribution and gratitude to the people who maintain them.

• Open Plaques, dedicated to the public domain (CC0). See openplaques.org.
• Wikidata, available under the CC0 1.0 Universal dedication.
• © OpenStreetMap contributors, available under the Open Database Licence.
• Historic England, National Heritage List for England, used under the Open Government Licence v3.0. War memorial records are drawn from open community datasets (OpenStreetMap, Wikidata, NHLE) — never from the Commonwealth War Graves Commission, which is excluded.

Editorial descriptions, photography and tribute links are original TributeLegacy work, layered on top of the open data.