Ancient Trees in Leuven
ancienttrees.app

The Arenbergpark Plane
London Plane (Platanus x acerifolia). roughly 230 to 250 years. Free, open public park (KU Leuven's Arenbergpark, open grounds around the castle)

The Drie Linden Chapel Lindens
Lime (Tilia sp.). not documented; the chapel beside them dates to the late 18th century. Free, a roadside chapel on public ground at a street corner (a triangular public plot), always visible/reachable

The Sint-Geertrui Wine Press Mulberry
Black Mulberry (Morus nigra). not documented. Free, standing at a public street corner (Wijnpersstraat/Donkerstraat); the register locates it at the corner rather than inside the neighbouring school's grounds. The Wijnpershuis itself is now the Provinciale School voor Moes- en Tuinbouw (De Wijnpers), a working horticultural school; the tree itself is not stated to be behind its gate.

The Ymeria Bundle Plane
London Plane (Platanus x acerifolia). . Free, public. Stands beside the Ymeria community meeting house (ontmoetingshuis) and sports grounds in Wijgmaal, at a street corner rather than inside the fenced pitches. Onroerend Erfgoed's own 2015 field report calls it 'this busy, publicly visited location' (deze druk bezochte publieke locatie). The football pitches themselves are bookable by reservation (confirmed via leuven.be/voetbalterreinen-ymeria), but the tree itself stands at the community-house/street side, not on the enclosed playing surface.