The location was adjacent to prominent cliffs with a cave above the river Danube that provides some shelter and was subsequently called the 'Hoppefelsen' in memory of Hoppe.
He walked there accompanied by his friends Ernst Wilhelm Martius, Johann August Stallknecht and Heinrich Christian Funck, all pharmacists, and then read a statement of the aims and rules of the new Regensburg Botanical Society.
The Botanical Society of Regensburg, which he founded in May 1790, gave him credit and consecrated this area favored by flora.
F. G. De Bray and C. Duval The ruler of the Principality of Regensburg, Prince-Archbishop Karl Theodor von Dalberg supported the society in its early years.
He gave it the garden of Saint Emmeram's Abbey, which had had a long tradition of scientific enquiry.
[6] The most substantial donation of additional material to the herbarium, 20,000 specimens, was from the estate of Baron Franz Ludwig von Welden, an Austrian army officer who travelled widely.