What is the oldest tree in Sittard-Geleen?

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. Geleen's three trees trace the district's industrial growth: a red oak by the station, a sycamore on Janskamperstraat, and an oak on Rijksweg Noord whose trunk runs four and a half metres round, standing in the path of a planned housing development the register's own surveyor hopes will spare it. Sittard holds two clusters: a copper beech and an ash in the Jardin d'Isabelle, a historic town garden where the register says the poet Charles Beltjens once met his beloved, and a pin oak and a tulip tree planted together in the municipal Stadspark. Where a pin is marked approximate, we know the site and not the exact trunk.