The movie: The Davinci Code image has a key with the fluer de lis crafted on it, and behind the key is a picture of the Mona Lisa.

Previously mentioned is the Payseur family line alleging that they are descendants of the Christ

Fleur de lis is their crest/symbol.

ma dona, my lady, ma'am, Madonna

"Mona" Can be monkey, idiot, cunt, silly, dupe, or moon (in middle English)

https://en.wiktionary.org/wiki/mona#Italian

I find the moon aspect interesting in context of a posssible priestess.

https://isiopolis.com/2014/05/24/is-isis-a-moon-goddess-or-a-sun-goddess/

https://wakingbeautymystery.wordpress.com/2012/02/01/mona-lisa-high-priestess-and-magdalene/

The high priestess tarot image has the Egyptian hathor disk.

Is Mona Lisa an anagram for Amon + L'isa? Remains to be seen. I have not found anything to support L'isa = Isis as an anagram, though I think there is plenty of symbolism to support that idea.

A week or so back I was pondering Mary Magdalene as the moon goddess, Isis.

http://themotherhouseofthegoddess.com/2016/07/10/mary-magdalene-is-the-moon/

If Jesus is the Sun, representing all that is external, intellectual, rational, linear, logical, masculine, pragmatic and proactive, then Mary Magdalene is the Moon.

Near the end of the Davinci code movie, under Rosslyn chapel, the covering of Mary's tomb shows a carved moon on it.

The very last scene of the movie, the halo and wings behind the female body in the tomb, could be interpreted to be the Hathor disk.

https://www.britannica.com/topic/Isis-Egyptian-goddess

"Isis became known, like other fierce goddesses in the Egyptian pantheon, as the “Eye of Re” and was equated with the Dog Star, Sothis (Sirius)."

(((They))) like "moon/dog" worship.

Payseurs own the Vatican

https://www.sgtreport.com/2018/08/read-this-now-p-the-unseen-masters-of-all-qanon-greatawakening-whoisp-illuminati-13bloodlines-payseur-springmeier/

https://en.wikipedia.org/wiki/Mona_Lisa

The title of the painting, which is known in English as Mona Lisa, comes from a description by Renaissance art historian Giorgio Vasari, who wrote "Leonardo undertook to paint, for Francesco del Giocondo, the portrait of Mona Lisa, his wife."[13][14] Mona in Italian is a polite form of address originating as ma donna – similar to Ma'am, Madam, or my lady in English. This became madonna, and its contraction mona. The title of the painting, though traditionally spelled Mona (as used by Vasari),[13] is also commonly spelled in modern Italian as Monna Lisa (mona being a vulgarity in some Italian dialects), but this is rare in English.

https://en.wikipedia.org/wiki/Madonna_(art)

Madonna is typically used for/as Mother Mary.

This is interesting when you consider Madonna, the pop-singer, is thought to be a priestess and typically acts in a vulgar manner, with a child named Lourdes.

"The last supper" has a fleur de lis in the background. (Red on walls. Not precise, but there)

Davinci's Mona Lisa and Mary Magdalene are close in some respects. A few years, a few pounds. The nose is similar, the mouth as bit. Hair not so much, but a little similar, though it could be a common hairstyle during Davici's time.

I've found a bit of support for the idea.

https://www.shroomery.org/forums/showflat.php/Number/7145179

https://www.thevintagenews.com/2019/02/21/the-last-supper/

"John" in the "Last Supper" is thought to be Mary.

https://classicculturex.wordpress.com/2018/05/08/why-is-leonardo-da-vincis-mona-lisa-smiling/

https://www.crystalinks.com/MonaLisa.html

http://www.historyversusthedavincicode.com/chaptertwentysix.htm

http://www.religionfacts.com/da-vinci-code/mona-lisa

Mona Lisa painting contains hidden code

https://www.telegraph.co.uk/culture/art/art-news/8197896/Mona-Lisa-painting-contains-hidden-code.html