Births on April 30

Walter Simon, German banker and philanthropist (d. 1920)

Walter Simon (30 April 1857 – 1 April 1920) was a German banker, councillor and philanthropist active in Königsberg and Tübingen.

23 Mar

Elevator
Elisha Otis's first elevator is installed at 488 Broadway New York City.
29 Mar

Indian Rebellion of 1857
Sepoy Mangal Pandey of the 34th Regiment, Bengal Native Infantry mutinies against the East India Company's rule in India and inspires the protracted Indian Rebellion of 1857, also known as the Sepoy Mutiny.
18 Apr

Allan Kardec
"The Spirits Book" by Allan Kardec is published, marking the birth of Spiritualism in France.
6 May

War of Independence of 1857
The British East India Company disbands the 34th Regiment of Bengal Native Infantry whose sepoy Mangal Pandey had earlier revolted against the British and is considered to be the First Martyr in the War of Indian Independence.
1 Jun

Les Fleurs du mal
Charles Baudelaire's Les Fleurs du mal is published.