Spouse
Children
1866
| 1866 • The kingdoms of Italy and Prussia form an alliance against the Austrian Empire. |
1887
Jan 2
Age: 21y
|
marriageFriederich Wilhelm Roetzheim Chicago, Cook, Illinois, USA ⇓ 1 Source ⇓ |
| 1887 • Heinrich Hertz discovers the photoelectric effect on the production and reception of electromagnetic (EM) waves (radio). This was an important step towards the understanding of the quantum nature of light. |
1887
Jul 4
Age: 21y
birth of childTheodore Roetzheim Chicago, Cook, Illinois, USA ⇓ |
| 1887 • Battle of Dogali: Abyssinian troops defeat the Italians. |
1889
Feb 14
Age: 23y
birth of childPauline A Roetzheim Chicago, Cook, Illinois, USA ⇓ 1 Source ⇓ |
| 1889 • British South Africa Company receives a Royal Charter. |
1900
Age: 34y
| 1900 • The first zeppelin flight is carried out over Lake Constance near Friedrichshafen, Germany. |
1927
Age: 61y
| 1927 • The Communist Chinese People's Liberation Army is formed during the Nanchang Uprising. |