James Abbott McNeill Whistler's "Whistler's Mother"

Origin
James McNeill Whistler was an American painter in the late 19th century. His most famous painting is "Arrangement in Grey and Black No.1", aka "Whistler's Mother", as the subject in the painting was the artist's mother. Several claims have been made that different women posed for him while he was painting different parts of the painting, but much of it is speculation. Whistler submitted the painting to the Exhibition of the Royal Academy of Art in London in 1872. It was nearly rejected due to the unconventional arrangement of the subject within the portrait. Traditionally the subject would be dead center in the painting, but Whistler's Mother is slightly to the left.

Effects
When someone says, "But Mother" in the immediate vicinity, the subject of the painting will come alive within the portrait. She will then nag the user with motherly advice and concerns, asking if they are eating well or getting enough sleep. Different people report hearing different sounding voices from the woman, leading agents to believe that one would hear their own mother's voice from the painting.

While not dangerous, it can become aggravating, as Whistler's Mother will lay down a guilt trip to anyone who tries to walk away or neutralize the artifact.

Collection
Collected from the Musée d'Orsay in Paris after a night guardsmen reported being nagged by the painting. He was taking a cell phone call with his own mother when the painting came to life.