Which Spanish artist painted the Black Paintings on his own walls?

Goya, in his seventies, deaf, ill and living alone outside Madrid in a house called the Quinta del Sordo - the deaf man's house. He painted fourteen works directly onto the plaster walls, never exhibited them, never named them, and left no word about what they were for.

They are unlike anything before them. Saturn devouring his son, a dog's head barely visible above a rising expanse of nothing, a witches' sabbath, two men clubbing each other while sunk to their knees in mud. The palette is black, brown and ochre. They were transferred to canvas fifty years after his death in an operation that damaged them badly and involved a certain amount of repainting, so what hangs in the Prado is not quite what was on the wall.

He had been court painter and produced a royal group portrait so unflattering that art historians have argued for two centuries about whether the family noticed. He also made the Disasters of War, a series of etchings of atrocities from the Peninsular War, unpublishable in his lifetime and printed 35 years after he died - among the first works to treat war as neither heroic nor allegorical but simply as what happens to people.