¿Cuál es el árbol más antiguo de Heerlen?

Ages here come from the Landelijk Register Monumentale Bomen, which records a planting decade rather than a year, so every figure on this page is a band. The register is the single source throughout, so every entry ships flagged rather than confirmed. Three trees, two oaks and the lime, stand on or near the wooded grounds around Kasteel Eyckholt and Terworm, private country estates whose land is now managed as public woodland; a fourth tree, the plane known locally as the Oak of Terworm, grows at a nearby crossroads and carries the clearest history of any entry here, probably planted in 1749 to mark an heir's birth. The rest stand in the city itself: a street tree named for the 1920s mining colony neighbourhood it grew up in, a park tree from the same era, a ginkgo on the drive to Terworm castle, and a catalpa outside the town hall. Where a pin is marked approximate, we know the site and not the exact trunk.