The first one that comes to mind, as there are many, is the eruption of Mount Vesuvius in 79 A.D. The second would be the assassination of Caesar on the Ides o

The first one that comes to mind, as there are many, is the eruption of Mount Vesuvius in 79 A.D. The second would be the assassination of Caesar on the Ides of March 44 B.C. Crucifixion of Jesus Christ in 30 A.D. Battle of Thermopylae, 480 B.C.