Flag of Greece designs differ according to the historical era they were used in and in accordance with the political scene in Greece at the time. The first flag to be used by a head of state of Greece was that of King Otto of Greece. Following the establishment of the Kingdom of Greece in 1832, the 17-year old Bavarian prince Otto was selected as king for the newfound monarchy. A royal decree dated 4 (16) April 1833 prescribed a number of maritime flags, including the royal standard. This flag, set at a 7:10 ratio, was a variant of the Greek white-cross-on-blue and
Flag of Greece the royal flags, which featured the coat of arms of the House of Schleswig-Holstein-Sonderburg-Glücksburg on a square version of the national flag. A square version of the land flag with St. George in the centre was adopted on 9 April 1864 as the Army's colours. The exact shape and usage of the flags was determined by Royal Decree on 26 September 1867. By a new Royal Decree, on 31 May 1914, the various flags of Greece and its military were further regulated. By this decree, the flag with the crown was adopted for use as a state flag by ministries,