Hidden secrets
Mona Lisa

- In the right eye appear to be the letters ''LV'' which could well stand for his name Leonardo Da -Vinci while in the left eye there are also symbols but they are not as defined.
- To the naked eye the symbols are not visible but with a magnifying glass they can clearly be seen
- The numbers and letters aren't visible to the human eye but have to be viewed under a microscope
http://www.telegraph.co.uk/culture/art/art-news/8197896/Mona-Lisa-painting-contains-hidden-code.html
Toy story based on the holocaust theory.
The abandoned toys represent the Jews of Europe, abandoned to the Nazis; they suggest taking sanctuary in the attic, echoing Anne Frank; Sunnyside stands in for a concentration camp, with Andy’s toys representing the “undesirables” sent there as they are no longer needed; the toys finally face the incinerator, representing the mass murder of the Jewish people
http://www.slashfilm.com/wacky-film-theories-toy-story-3-and-the-holocaust/
Remember where you came from.

People who pass this piece in Los Angeles may wonder if they’re being warned, mocked, or simply entertained by a peculiar caveman with his fast food combo meal. This is simply a subtle reminder of our human nature and of those things that we’ve adopted that arent really that natural. for example Mcdonalds , Burgerkingetc.
http://www.lifehack.org/articles/communication/15-life-lessons-from-banksy-street-art-that-will-leave-you-lost-for-words.html
Love is not lust
This is painted outside of a New York City strip club seems to highlight the ugly truth about society’s sex obsession: it never leads to fulfillment at least not for this poor guy.
Banksy posted the phrase, “waiting in vain” along with a picture of the stencil on his website, this suggest that the guy in the picture is in the wrong place if he wants to find genuine love.
http://www.lifehack.org/articles/communication/15-life-lessons-from-banksy-street-art-that-will-leave-you-lost-for-words.html
Live in the moment

One of Banksy most recent pieces, called Mobile Lovers was done in Bristol . This isn't a reference to modern technology this is to warn us to be conscious of what we’re spending our time and attention on. Nothing that exists on a screen in more important than what is happening right in front of us. By being constantly preoccupied, we could miss out on meaningful opportunities and connection with others. This shows to basically ''Live the moment''
A painting done in the fifteenth century by Ghirlandaio
Above Mary's left shoulder we observe a disk-shaped object that appears to be shining. It is an object which the artist depicted in huge detail , making sure it would stand out in his work of art. This is definitely a UFO sighting in the painting.
In the fifteenth century if you were a living artist you had to follow certain unwritten rules if you wanted to depict something strange or different in a painting. In the foreground you had to paint a religious scene or depict religious figures otherwise you would be denounced as a devil worshiper and literally burned at the stake or beheaded that's why all UFOs in these ancient works of art are rendered small and in the background.