Fait général: 1756 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Fait mathématique: 1756 is the number of ways to stack 28 boxes in a line so that each box lies on the table or on a box next to 2 boxes.
Culture générale: 1756 is a boring number.
Date historique: October 21st is the day in 1774 that First display of the word "Liberty" on a flag, raised by colonists in Taunton, Massachusetts in defiance of British rule in Colonial America.