Fait général: 1597 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Fait mathématique: 1597 is the 17^{th} Fibonacci number.
Culture générale: 1597 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Date historique: May 15th is the day in 1793 that Diego Marín Aguilera flies a glider for "about 360 meters", at a height of 5-6 meters, during one of the first attempted .