Entitled: "A true and exact relation of the late prodigious earthquake and eruption of Mount Etna; as it came in a letter written to His Majesty from Naples by the Right Honorable the Earle of Winchilsea, His Majesties late ambassador at Constantinople, who was an eye-witness of that dreadfull spectacle. 1669." Mount Etna is an active stratovolcano on the east coast of Sicily, Italy. Etna's most destructive eruption since 122 BC started on March 11, 1669 and produced lava flows that destroyed at least 10 villages on its southern flank before reaching the city walls of the town of Catania five weeks later. The lava was largely diverted by these walls into the sea to the south of the city, filling the harbor of Catania.