Births on April 19

Otto Georg Thierack, German jurist and politician (d. 1946)

Otto Georg Thierack (19 April 1889 – 26 October 1946) was a German Nazi jurist and politician.

8 Jan

Punched card
Herman Hollerith is issued US patent #395,791 for the 'Art of Applying Statistics' — his punched card calculator.
30 Jan

Mayerling Incident
Archduke Crown Prince Rudolf of Austria, heir to the Austro-Hungarian crown, is found dead with his mistress Baroness Mary Vetsera in the Mayerling.
23 Mar

Mirza Ghulam Ahmad
The Ahmadiyya Muslim Community is established by Mirza Ghulam Ahmad in Qadian, British India.
2 May

Treaty of Wuchale
Menelik II, Emperor of Ethiopia, signs the Treaty of Wuchale, giving Italy control over Eritrea.
6 May

Exposition Universelle (1889)
The Eiffel Tower is officially opened to the public at the Universal Exposition in Paris.