Gustav IV Adolf or Gustav IV Adolph was King of Sweden from 1792 until he was deposed in a coup in 1809. He was also the last Swedish monarch to be the ruler of Finland.
Gustav Adolf at the age of seven
Walking with his wife Queen Frederica
Charles XIII, or Carl XIII, was King of Sweden from 1809 and King of Norway from 1814 to his death. He was the second son of King Adolf Frederick of Sweden and Louisa Ulrika of Prussia, sister of Frederick the Great.
Prince Charles, in 1758 by Ulrica Pasch.
Gustav III, King of Sweden, and his brothers
Coronet created for Prince Charles and worn at his brother Gustav's coronation in 1772.