A Swiss art historian takes the toughest line on the Italian master.
Michelangelo destroyed many of his drawings and sketches later in life, thinking that only the perfect ones should survive him. This is partly the reason why the attribution of his work is quite controversial. Art historians believe there are about 600 drawings by Michelangelo. Professor Alexander Perrig says only about 100 are authentic. (SF Kulturplatz/swissinfo.ch)