April 23

Tuesday 23, 1968:

Vietnam War: Student protesters at Columbia University in New York City take over administration buildings and shut down the university.

Tuesday 23, 1935:

Polish Constitution of 1935 is adopted.

Tuesday 23, 1867:

William Lincoln patents the zoetrope, a machine which shows animated pictures by mounting a strip of drawings in a wheel.

Wednesday 23, 1597:

Shakespeare's The Merry Wives of Windsor is first performed, with Queen Elizabeth I of England in attendance.

Saturday 23, 1014:

Battle of Clontarf: Brian Boru defeats Viking invaders, but is killed in battle.

More on April, 23

• April, 23 in History
• People Born on April, 23
• They left us on April, 23