Fatto generale: 1522 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Fatto matematico: 1522 is a boring number.
Trivia: 1522 is a boring number.
Data storica: March 1st is the day in 1989 that the United States becomes a member of the Berne Convention for the Protection of Literary and Artistic Works.