The Solutions:

1) snoitavresbo sih no desab tnempoleved cihpargotohp hcihw. Sdrib gnihctaw ot sevol odranoel? ( Bellotto was pleasured about it!) Hint: Leonardo was an italian!

read the question backward. Leonardo wrote all his notes from right to the left. I do it also. Then ask Wiki after "Belotto". He has used a "Camera Obscura". In italian language is it a "camera oscura". Then write it backwards: arucso oremac.

2)Dan said: and a lama mirage

That's an anagram. Dan Brown wrote about Maria Magdalena in his "Da Vinci Code".

3) What´s that?

FR: 1 k, YO, k, BR:K ( front row knit 1, yarn over, knit. Back row: knit)

okay, that is a knitting pattern from Josephines shawl. After a legend Napoleons wife knit this shawl during she was waiting of him.

4)Wanted:

clever head, developed the maths of the daVinci shawl. But he didn´t have a name for the forumlars.

Eureka! Archimedes has founded the Number PI. The Da Vinci Shawl is based on this number.

5) a disarminly word from a teenager

of course "disarminly" is a verb, not an adjective. Harry Potter has to shout out " expelliarmus" to disarming his opponents.

6) Men doesn't knit? This german one knits arts!

Herbert Niebling has developed a lot of very beautiful doilies and shawls. Ask Amazon ;-)