| Max Karl Ernst Ludwig Planck (2562 words) |
 | Max Karl Ernst Ludwig Planck (April 23, 1858 – October 4, 1947) was one of the most important German physicists of the late 19th and early 20th century; he is considered to be the inventor of quantum theory. |
| Max Planck was born in Kiel on April 23, 1858 to Johann Julius Wilhelm Planck and his second wife, Emma Patzig. |
| In 1938, Planck celebrated his 80th birthday; the DPG held an official celebration, during which the Max-Planck medal (founded as the highest medal by the DPG in 1928) was awarded to French physicist Louis de Broglie - one year before the outbreak of a new war between France and Germany. |
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