Ferdinand Hamer, Dutch bishop and missionary (d. 1900)
Ferdinandus Hubertus Hamer C.I.C.M. (born 21 August 1840 in Nijmegen, Netherlands, died 23 July 1900 in To Tsjeng, Inner Mongolia, China) was a Catholic missionary to China and bishop who was killed in the Boxer Rebellion in China.

1840Aug, 21
Ferdinand Hamer
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Events on 1840
- 10Feb
Prince Albert of Saxe-Coburg-Gotha
Queen Victoria of the United Kingdom marries Prince Albert of Saxe-Coburg-Gotha. - 11Feb
La fille du régiment
Gaetano Donizetti's opera La fille du régiment receives its first performance in Paris, France. - 22May
New South Wales
The transportation of British convicts to the New South Wales colony is abolished. - 23Jul
Act of Union 1840
The Province of Canada is created by the Act of Union. - 11Oct
Bashir Shihab II
The Maronite leader Bashir Shihab II surrenders to the Ottoman Empire and later is sent to Malta in exile.