Regensburgで最も古い樹木はどれですか。
The oldest tree on this Regensburg page is the plane in the Herzogspark, put at roughly 200 years old, standing in the public park at the northwestern edge of the old town beside the medieval Prebrunnturm. It is also the only one of these five trees with any age attached to it at all, and that figure comes from a photographer's caption written on site in 2022 rather than from a survey or a ring count, so read it as one person's estimate. The other four, two more planes and two chestnut groups, are protected by the city without a date between them: Regensburg's natural monument register records what is designated and when it was designated, never how old it is. Any one of the undated four could be older, and nobody has checked. If you know of a girth measurement or a planting record for any of them, tell us and this page changes.
Regensburg is a city that protects individual trees rather than dating them. Its natural monument ordinance gives each protected tree or group a number, a street and a date of designation, and no age whatsoever, which is why four of the five trees here carry no figure and the fifth's roughly 200 years rests on a photographer's caption instead of a measurement. What the city does offer is trees that are unusually easy to see in one go. The Herzogspark plane and the Singrün corner plane are about five minutes apart in Prebrunn, on the western edge of the old town. The plane at the Alter Kornmarkt stands in the middle of the UNESCO-listed centre, on a square in use as trading ground since Roman times. The two chestnut groups are over the Steinerne Bruecke in Stadtamhof, a few doors apart on the same street, protected under separate numbers granted a year apart. All five are free and reachable on foot from Regensburg Hauptbahnhof. If you can date any of them, tell us.