Otto Marseus van Schrieck's Medusa and Percy Bysshe Shelley's poem

In 1819, the English poet Percy Bysshe Shelley, after a visit to the Uffizi, wrote "On the Medusa by Leonardo da Vinci in the Florentine Gallery", thus following the traditional attribution of the painting at that time (whereas nowadays it is attributed to a 17th-century Flemish painter). The poet's verses demonstrate how the painting exactly responds to the canons of the Romantic idea of "sublime"