Here are some one liners...
Dracula is Dead... for Now -- Vlad the 3rd the Impaler dies in battle. He is buried at the cemetery of a local abbey but years later his grave will be unearthed and they will find nothing but a few animal bones. I also talk about a novel "Out of the Dark" that combines vampires, alien invasion and a survivalist theme.
The Plague Kills the Calendar Fix -- A German astronomer named Muller, is called to Rome to fix the Julian calendar but he dies of the Plague. I then talk about last names and how they are formed from the names of towns, occupations and even after one's own father.