<human>:  Why did the author use the name ‘Da Vinci’ in the book ‘The Da Vinci Code’?
<bot>: Leonardo da Vinci was an Italian artist, sculptor, painter, architect, and scientist. He was one of the most famous painters of the Renaissance, and is widely considered to be one of the greatest painters who ever lived. He was also a gifted inventor, engineer, and mathematician. The book The Da Vinci Code was written by Dan Brown, and the title refers to the fact that many of the characters in the book are involved in the search for the Holy Grail.