11) How long did it take Leonardo da Vinci to paint the Mona Lisa?
12) What type of painting is the Mona Lisa?
13) What colour are Mona Lisa's eyes?
14) Where is the Mona Lisa housed today?
15) What is the estimated value of the Mona Lisa?
16) When was the Mona Lisa stolen from the Louvre?
17) Who stole the Mona Lisa in 1911?
18) What size is the Mona Lisa painting?
19) In what year was the Mona Lisa completed?
20) What is the subject of the Mona Lisa smiling?