Gustav Adolf was deposed by a conspiracy of army officers. On 7 March 1809
lieutenant-colonel Georg Adlersparre, commander of a part of the so-called western army stationed in
Värmland, triggered the
Coup of 1809 by raising the flag of rebellion in
Karlstad and starting to march upon Stockholm. To prevent the king from joining loyal troops in Scania, on 13 March 1809 seven of the conspirators led by
Carl Johan Adlercreutz broke into the royal apartments in the palace, seized the king, and imprisoned him and his family in
Gripsholm Castle; the king's uncle, Duke Charles (Karl), accepted the leadership of a provisional government, which was proclaimed the same day; and a diet, hastily summoned, solemnly approved of the
revolution. On 29 March Gustav IV Adolf, to save the crown for his son, voluntarily abdicated; but on 10 May the
Riksdag of the Estates, dominated by the
army, declared that not merely Gustav but his whole family had forfeited the throne, perhaps an excuse to exclude his family from succession based on the rumours of his illegitimacy. A more likely cause, however, was that the revolutionaries feared that Gustav Adolf's son, if he inherited the throne, would avenge his father's deposition when he came of age. On 5 June Gustav Adolf's uncle was proclaimed King
Charles XIII, after accepting a new liberal
constitution, which was ratified by the diet the next day. Contemporary British newspaper reports mention that in November 1810, he fled
Riga aboard an American ship, transited to HMS , before transferring him to , to be shuttled aboard a sloop and to arrive at
Great Yarmouth on 11 November 1810, and disembarked on 14 November. He embarked at Yarmouth, and landed at
Heligoland on the Baltic Coast on 2 April 1811. , Gustav Adolf and his family were transported to Germany. In 1812, he divorced his wife. In exile Gustav Adolf used several titles, including Count
Gottorp and Duke of
Holstein-Eutin, and finally settled at
St. Gallen in
Switzerland where he lived in a small hotel in great loneliness and indigence, under the name of Colonel Gustafsson. It was there that he suffered a stroke and died on 7 February 1837. He was buried in
Moravia. At the suggestion of King
Oscar II and Norway, his body was finally brought to Sweden and interred in
Riddarholm Church. Gustav Adolf was the great-grandfather of
Victoria of Baden, Oscar's new daughter-in-law at the time and eventually Queen of Sweden as consort to Oscar's son
Gustaf V. == Arms ==