I've been reading this cool book about da Vinci.
About Leonardo da Vinci or simply Leonardo? What did you learn about him?
Leonardo da Vinci, he was a very interesting man. He was an architect, musician, engineer, scientist and inventor.
Thats exactly why he has been variously called the father of palaeontology, ichnology, and architecture. He is an inspiration! 
Yes, he's most known for painting the Mona Lisa. 
I have actually seen Mona Lisa, it has been described as "the best known, the most visited, the most written about art of all time!
It's crazy how long it took to paint. It took 4 years to paint it, although it was unfinished, it took another 3 years to complete, up to the year the painter died in 1519. Around 7 years of painting!
Yes and no wonder  The "Mona Lisa" is one of the most valuable paintings in the world! It is truly remarkable! 
it's worth like $620 million.