Osiris became the first discovered exoplanet with an atmosphere.
It was found to have a hydrogen-rich atmosphere.
Source
The Congress of Vienna declared Kraków, Poland, a free republic state, and the Constitution of the Kingdom of Poland was signed.
Eight Donkeys were freed from jail after four days in Orai, Uttar Pradesh, India.
Walt Disney's 'Frozen' was released in American movie theaters.
British pharmacist John Walker invented the matchstick by accident.
Pope Anastasius I became the Bishop of Rome, reigning until his death.
