The Doctor: Prince of Clowns

An interesting fact is that at least two of the Doctor's incarnations have appeared as famous people in history - one contemporary with the "actor" portraying his second incarnation.
His second incarnation:

And Moe of Three Stooges fame:

Obviously, the Second Doctor got a haircut and decided to take a vacation and fulfill his lifelong dream of being a comedian.

And then there's the Ninth Doctor:

and Machiavelli:

The Ninth Doctor must have tried the same thing the Master did, but for some reason regained his Time Lordiness before the Time War ended.