Fatto generale: 1567 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Fatto matematico: 1567 is an unremarkable number.
Trivia: 1567 is a boring number.
Data storica: April 15th is the day in 1783 that Preliminary articles of peace ending the American Revolutionary War (or American War of Independence) are ratified.