1. Who was the tallest U.S. president, at 6 feet 4 inches?

2. What Viennese doctor took eight years to sell the 600-copy print run of his landmark work 'The Interpretation of Dreams'?

3. Who was executed in Rouen, France, on May 30, 1431, and had her ashes thrown into the Seine River?

4. This year, the Italian island of Elba celebrated the 200th anniversary of whose famous exile there?

5. In 399 B.C., who was sentenced to death by drinking poison hemlock for “corrupting the youth” of Athens?

What’s the "Kennection" between all five answers?