Deaths on November 20

Willem de Sitter, Dutch mathematician, physicist, and astronomer (b. 1872)

Willem de Sitter (6 May 1872 – 20 November 1934) was a Dutch mathematician, physicist, and astronomer.

23 May

Bonnie and Clyde
Infamous American bank robbers Bonnie and Clyde are ambushed by police and killed in Bienville Parish, Louisiana.
2 Aug

Adolf Hitler
Gleichschaltung: Adolf Hitler becomes Führer of Germany following the death of President Paul von Hindenburg.
26 Sep

RMS Queen Mary
Steamship RMS Queen Mary is launched.
9 Oct

Alexander I of Yugoslavia
Regicide at Marseille: The assassination of King Alexander I of Yugoslavia and Louis Barthou, Foreign Minister of France.
6 Nov

Tennessee Valley Authority
Memphis, Tennessee becomes the first major city to join the Tennessee Valley Authority.