Mystical symbols in 'Mona Lisa'

I read "Mystical symbols in 'Mona Lisa'" by weekly ST World News online.


a. The words I did not know.

1)attesting to ～

Sentence:
The symbols open up new leads to identifying the model, dating the painting and attesting to Leonardo's interest in religion and mysticism.

Definition:
～を証明する

Synonyms:
proving to ～, showing, demonstrating,

Comment:（英語で書こうとしたのですが、うまく伝えられないので簡潔に日本語で書きます。）
もし、選択問題で、attesting の後に来る単語を選べと言われたら、私は、なんとなくですが　for を選んでしまうので、誤解を正そうと選びました。もちろんこの動詞の意味も知らなかったのですが…。



c. Comments about the news.
I read some books written by Dan Brown about five years ago. They were also famous books then, the book became a movie after I read them. I went to see the movie, too. I like novels better than it.
Leonardo da Vinci's Mona Lisa is one of the most famous picture in the world. I'm not interested in it well, but many people love mystery of her. I don't know how long will be Mona Lisa here in the future, I believe there will be people who love mystery forever.