For thousands of years, the angel has been thought of as a supernatural being or spirit, often depicted in human form with wings and halos around their head. In certain religions they are also depicted as celestial beings who act as intermediaries between Heaven and Earth, or as guardian spirits or a guiding influence. Angels are also thought to protect and guide humans, and carry out God's work.
Throughout history, even Churches defined different categories of angels, with appropriate missions and activities assigned to each one. There are also two distinct beliefs that angels have physical bodies or that they are entirely spiritual/energy/light.
Most angel monuments depict a praying or weeping angel to express grief, loss and mourning for the deceased. They are meant to honor the death of a loved one, while helping to comfort the living. They also serve the dual purpose of helping to protect the deceased, while also guiding them through the afterlife.
A recent study showed that many people today have had an experience of what they may have thought to be an angel presence. These types of experiences range from visions, sometimes with multiple witnesses present or conveying a warning; to a sense of being touched, pushed, or lifted, typically to avert a dangerous situation; or even a pleasant fragrance or familiar scent, generally in the context of someone's death. In the visual experiences, the angels described appear in various forms, either the "classical" one (human countenance with wings), in the form of extraordinarily illuminated human or as visions of light.