Fatto generale: 1593 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Fatto matematico: 1593 is an unremarkable number.
Trivia: 1593 is an uninteresting number.
Data storica: May 11th is the day in 1812 that Prime Minister Spencer Perceval is assassinated by John Bellingham in the lobby of the House of Commons, London.