Dusseldorf Hofgarten

Somebody has noticed that this tree (fallen or otherwise) is infected with Ganoderma applanatum and has gone to most commendable measures to preserve these specimen fungi. They have built a greenhouse around the trunk. There were hundreds of comparitively young fruiting bodies and a few loose older ones. If anyone has any information relating to this or the name and address of the person(s) responsible I would love to know.