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Alexander (pictured) was crowned King of Greece, succeeding his father Constantine I, who had abdicated.

Historical image related to Alexander (pictured) was crowned King of Greece, succeeding his father Constantine I, who had abdicated. from June 11, 1917

Alexander of Greece

King of Greece from 1917 to 1920

Alexander was King of Greece from 11 June 1917 until his death on 25 October 1920.
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List of kings of Greece

The Kingdom of Greece was ruled by the House of Wittelsbach from 1832 to 1862 and by the House of Glücksburg from 1863 to 1924 and, after being temporarily abolished in favor of the Second Hellenic Republic, again from 1935 to 1973, when it was once more abolished and replaced…
Source: Wikipedia (CC BY-SA)

Constantine I of Greece

King of Greece (r. 1913–17; 1920–22)

Constantine I was King of Greece from 18 March 1913 to 11 June 1917 and again from 19 December 1920 to 27 September 1922. He was commander-in-chief of the Hellenic Army during the unsuccessful Greco-Turkish War of 1897 and led the Greek forces during the successful Balkan Wars…
Source: Wikipedia (CC BY-SA)