However, the painting wasn’t well received at the time and that was at least partly due to the depiction of the demon in the background.
Three years after it was painted, people attempted to cover up the demon but left a blur on the canvas. Now, the cover up job has been removed and the painting presents as the artist originally intended to mark what would have been Reynolds’ 300th birthday.
It wasn’t the easiest of tasks, with several layers of paint and six layers of varnish to uncover.
The National Trust’s senior national curator for pictures and sculpture, John Chu, said: “It didn’t fit in with some of the artistic rules of the times to have a poetic figure of speech represented so literally in this monstrous figure.
“When it was first shown at the Shakespeare Gallery in 1789 it generated more controversy than any other work on show.”