Willem II became King of the Netherlands.
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The first-ever infrared photo was taken in Rochester, New York.
Portuguese explorer Juan RodrĂguez Cabrillo discovers Catalina Island off the coast of California.
The Sonderkommandos, prisoners who took care of the bodies at the Auschwitz-Birkenau Concentration Camp, protested their pending mass murder.
Swedish music streaming service Spotify was launched by Daniel Ek and Martin Lorentzon.
Arnold Schwarzenegger became Governor of California.