The fat corner, the plastered bathtub, the touching "rabbit grave" made of rubbish - Joseph Beuys' works of art have long ceased to be the subject of jokes.

The work has long been canonized.

The last time there was a dispute about Beuys, it was actually always about the person.

Was he a genius?

A martyr?

A charlatan?

The Swiss art historian Beat Wyss broke out a bitter argument in 2008 when he identified an “eternal Hitler Youth” in the art magazine “Monopol” in Beuys, who was never able to shake off his influence during the Nazi era.