King of Hanover

The King of Hanover (German: König von Hannover) was the official title of the head of state and hereditary ruler of the Kingdom of Hanover, beginning with the proclamation of the King of the United Kingdom George III, as "King of Hanover" during the Congress of Vienna, on 12 October 1814 at Vienna, and ending with the annexation of Prussia on 20 September 1866.

History
In 1813, George III of the United Kingdom was restored to his Hanoverian territories, and in October 1814 they were constituted as the independent Kingdom of Hanover at the Congress of Vienna. The personal union with the United Kingdom ended in 1837 on the accession of Queen Victoria because the succession laws in Hanover, based on Salic law, prevented a female inheriting the title if there was any surviving male heir (in the United Kingdom, a male took precedence only over his own sisters).

Standard & Coat of arms
After the personal union with Great Britain ended in 1837, Hanover kept the British royal arms and standard, only introducing a new Crown (after the British model).