Question: Vortex Garten is a garden that alludes to the discovery of levitational force by the naturalist of what nationality?
Sentence (from "Vortex Garten"): It is a pantheistic permaculture garden at the art nouveau area of Mathildenhoehe and alludes to Viktor Schauberger’s discovery of “levitational force” through artistic depictions by internationally renowned sculptors including John Wilkes, Jacopo Foggini, Jerome Abel Seguin and Hyesung Hyun.
Relevant evidence: Yes