Fait général: 1266 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Fait mathématique: 1266 is a boring number.
Culture générale: 1266 is a boring number.
Date historique: June 19th is the day in 1862 that the U.S. Congress prohibits slavery in United States territories, nullifying Dred Scott v. Sandford.