Phlegraean Fields
The antiquarian Andrea di Jorio studied the ruins, and in 1817 published a guidebook to the Phlegraean Fields, with a map of the area which had many hot springs and volcanic craters as well as antiquarian sites including the supposed Temple. By this time the pavement was flooded by the sea, indicating a slight lowering of the land level. In 1820, he published a study of his "Ricerche sul Tempio di Serapide, in Puzzuoli", including an illustration based on a drawing by John Izard Middleton showing the three columns with the bands affected by molluscs.