1770 was a common year.
Events
March 5 – Boston Massacre: 5 Americans killed by British troops in an event that would help start the American Revolutionary War 5 years later. May 14 – Marie Antoinette arrives at the French court. May 16 – 14-year old Marie Antoinette marries 15-year old Louis-Auguste (who later becomes Louis XVI King of France). May 16 – Fireworks at the wedding of the crown prince of France in Paris cause a fire – 800 dead June 3 – Gasper de Portola and Father Junipero Serra establish Monterey, which was the capital of California from 1777-1849. July 1 – Comet Lexell (D/1770 L1) passes the Earth August 22 – James Cook claimed for Great Britain the eastern coast of New Holland (Australia) Joseph Priestley, British chemist, recommends the use of a rubber to remove pencil marks. Joseph Louis Lagrange proves Bachet's Conjecture.
Births
December 17 – Ludwig van Beethoven (baptised).