Gustav III (24 January [O.S. 13 January] 1746 – 29 March 1792), also called Gustavus III, was King of Sweden from 1771 until his assassination in 1792. He was the eldest son of King Adolf Frederick and Queen Louisa Ulrika of Sweden. Gustav was a vocal opponent of what he saw as the abuse of political privileges seized by the nobility since the death of King Charles XII in the Great Northern War. Seizing power from the government in a coup d'état, called the Swedish Revolution, in 1772, that ended the Age of Liberty, he initiated a campaign to restore a measure of royal autocracy.
https://en.wikipedia.org/wiki/Gustav_III