Deaths on August 4

Jules Lemaître, French playwright and critic (b. 1853)

François Élie Jules Lemaître (27 April 1853 – 4 August 1914) was a French critic and dramatist.

28 Jun

Assassination of Archduke Franz Ferdinand of Austria
Archduke Franz Ferdinand of Austria and his wife Sophie are assassinated in Sarajevo; this is the casus belli of World War I.
26 Jul

Bulgaria
Serbia and Bulgaria interrupt diplomatic relationship.
5 Aug

Traffic light
In Cleveland, Ohio, the first electric traffic light is installed.
15 Aug

Frank Lloyd Wright
A servant of American architect Frank Lloyd Wright murders seven people and sets fire to the living quarters of Wright's Wisconsin home, Taliesin.
1 Sep

Petrograd
St. Petersburg, Russia, changes its name to Petrograd.