541 John the Cappadocian is dismissed by Theodora for treason.
1478 George, Duke of Clarence, convicted of treason against his older brother Edward IV of England, is privately executed in the Tower of London.
1521 Edward Stafford, 3rd Duke of Buckingham, is executed for treason.
1540 One of the most important political figures of the reign of Henry VIII of England, Thomas Cromwell, is executed on order from the king on charges of treason. Henry marries his fifth wife, Catherine Howard, on the same day.
1603 Sir Walter Raleigh arrested for treason.
1603 Sir Walter Raleigh goes on trial for treason in the converted Great Hall of Winchester Castle
1619 Dutch statesman Johan van Oldenbarnevelt is executed in The Hague after having been accused of treason.
1645 Archbishop of Canterbury William Laud executed for treason on Tower Hill, London.
1661 The first Earl of Argyle is executed at the Mercat Cross in Edinburgh for treason
1691 Jacob Leisler is hanged for treason
1807 Sufficient evidence is presented to a grand jury to indict former Vice President of the United States Aaron Burr for treason.
1807 Former U.S. Vice President Aaron Burr is acquitted of treason. He had been accused of plotting to annex parts of Louisiana and Mexico to become part of an independent republi
1885 Canadian rebel leader of the
1945 World War II: Former premier of Vichy France, Pierre Laval, is executed by firing squad for treason.
1945 Norwegian Nazi leader, Vidkun Quisling, is shot by firing squad for treason.
1949
1999 Kurdish rebel leader bdullah
2003 500,000 Hong Kong people march to protest Hong Kong Basic Law Article 23, which controversially redefines treason.
2004 Mordechai Vanunu, who revealed an Israeli nuclear weapons programme in the 1980s, is released from prison in Israel after serving 18 years for treason.