Sweden
- Gustaf Mauritz Armfelt, attempted to overthrow the guardian-government of king Gustav IV Adolf with Russian military assistance.
- Johann Patkul, protested the land-recovery project of Charles XI of Sweden and, when unsuccessful, sided with Augustus the Strong and tried to wrest Livonia from Sweden.
- Magdalena Rudenschöld, for taking part in the Armfelt-conspiracy.
- Brita Tott, for exposing military movements to Denmark
- In 2001, four teenagers (their names were not reported) were convicted of treason after they assaulted King Carl Gustaf with a cream pie. The ringleader was fined 100 days income; the others were fined 80 days.
Read more about this topic: List Of People Convicted Of Treason