There was a great eruption from the eastern side of the mountain in 1181. Lava descended in the same vicinity in 1285. In 1329 Speziale was in Catania, and witnessed a very violent eruption, of which he has left us an account. On the evening of June 28th, about the hour of vespers, AEtna was strongly convulsed, terrible noises were emitted, and flames issued from the south side of the mountain. A new crater, Monte Lepre, opened above the rock of Musarra, and emitted large quantities of dense black smoke. Soon after a torrent of lava poured from the crater, and red-hot masses of rock were projected into the air. Four years after the last eruption it is recorded by Silvaggio that a fresh outburst took place. A manuscript preserved in the archives of the cathedral of Catania mentions an eruption which took place on August 6, 1371, which caused the destruction of numerous olive groves near the city. An eruption which lasted for twelve days commenced in November, 1408. A violent earthquake in 1444 caused the cone of the mountain to fall into the great crater. An eruption of short duration, of which we have no details, occurred in 1447; and after this AEtna was quiescent for eighty-nine years. Cardinal Bembo and Fazello mention an eruption which took place toward the close of the fifteenth century. In March, 1536, a quantity of lava issued from the great crater, and several new apertures opened near the summit of the mountain and emitted lava. A year later, in May, 1537, a fresh outburst occurred. A number of new mouths were opened on the south slope near La Fontanelle, and a quantity of lava burst forth which flowed in the direction of Catania, destroying a part of Nicolosi, and St. Antonio. In four days the lava ran fifteen miles. The cone of the great crater suddenly fell in, so as to become level with the Piano del Lago. The height of the mountain was thus diminished by 320 feet. Three new craters opened in November, 1566, on the northeast slope of the mountain. In 1579, 1603, 1607, 1610, 1614, and 1619, unimportant eruptions occurred. In February, 1633, Nicolosi was partly destroyed by a violent earthquake, and in the following December, earthquakes became frequent around the mountain. In 1646 a new mouth opened on the northeast side, and five years later several new mouths opened on the west side of the mountain and poured out vast volumes of lava which threatened to overwhelm Bronte. We have a more detailed account of the eruption of 1669 than any previous one. It was observed by many men of different nations, and there are a number of narratives regarding it. The eruption was in every respect one of the most terrible on record. On March 8th, the sun was obscured and a whirlwind blew over the face of the mountain; at the same time earthquakes were felt, and they continued to increase in violence for three days, at the end of which Nicolosi was converted into a heap of ruins.