Human beings have both good and evil. Children are more innocent and generally more honest. God sends his angels to guide us from the danger if we will watch and listen but ultimately it is our choice. There is good and evil in the world. Without both, how would we be able to know the difference? This picture was a puzzle to me as a child. I stared at it for hours trying to understand the meaning.
Yes it is, i have one
The artist, H. Zabateri, originally painted children on a bridge with a guardian angel protecting them as a postcard. Lindberg is a printing company that offers reproductions of the print done by various artists that typically are not named.
The painting of a guardian angel watching over a sleeping child was painted by the artist Thomas Blackshear The picture is titled Watchers in the Night and depicts an angel holding a candle over a sleeping child.
He painted it in 1886. (see below) I translated the following information from some old German book years ago.The joined the religious nature of the images increasingly into the background.Among the iconographic influences include William of Kaulbachs Sterbebild with a motif of the "angel of God" and the dreamy images of the Scotsman John Burr.guardian angel motif had its origins in devotional picture of the Nazarene and was then in the religious salon painting over before the picture of factories was discovered. In contrast to the medieval type of image Seelengeleits.A common form of guardian angel image shows a guardian angel next little girl in a nightdress during the morning and evening prayer before an iron or wooden cot. Such representations, often erotic allusions which were mainly in southern and central countries. The prototype for this picture genre of "praying children" was the painting of The Infant Samuel Joshua Reynolds.Another important form is the Engelgeleit in free landscape.Here again play the "abyss pictures" a big role. They go mostly on Bernhard Plockhorsts guardian angel picture back, 1886 at the Prussian Academy of Arts Berlin. The subject itself is even older and already in the 1830s encountered. Initially, almost exclusively young and images of girls on the rock cave or on a fragile bridge produced, together with a - contrary to all conventions of the Christian iconography - female angel, with its protective hands of the children pretty herausgeputzte couple watches. The thin, bright, light clothing of the depicted children with the reality had little in common. Overall vary only the background, the number of children (one or two) and clothing of Engels. Technical achievements such as rail and car were late and only occasionally displayed.
Yes.
it depends on what you belive, how vivid the picture is, and maybe it was the light or shadow to make you think you saw an angel
Passover - a feast to this day.
In the TV series "Supernatural" the character Sam Winchester is not depicted as a fallen angel, but rather, as a person with a very unusual destiny.
No he has no children.
Tyne bridge, angel of the north, the millennium bridge, penshaw monument, Durham cathedral, the f pit and the swing bridge. 
Lindberg was a pseudonym for a portrait painter named Grossmann. the painting is called Lindberg Heiliger Schutzengel.
Saint Matthew is not an angel, but rather one of the twelve apostles of Jesus Christ as described in the New Testament. He is depicted as a human figure in Christian tradition, not as an angel.