Which poet hosted the 1816 ghost story contest at Villa Diodati?

Lord Byron hosted the 1816 ghost story contest at Villa Diodati.

Byron rented the villa near Lake Geneva during the unusually cold and stormy summer of 1816. He stayed there with his physician, John Polidori, while Percy Bysshe Shelley, Mary Godwin, and Claire Clairmont visited from nearby.

Bad weather kept the group indoors, inspiring Byron to suggest that they each write a ghost story. Mary Godwin’s effort eventually became Frankenstein, published in 1818, while Polidori developed his story into The Vampyre, an influential early modern vampire tale.

The other names in the options were closely involved, which causes confusion: Polidori was Byron’s doctor, Percy Shelley was Mary’s companion, and Mary Shelley became Frankenstein’s author. Byron was the poet who rented the villa and initiated the challenge.