Why was Queen Elizabeth I beheaded?

Answer 1

She wasn't.

In March 1603, Queen Elizabeth fell sick and remained in a "settled and unremovable melancholy". She died on 24 March 1603 at Richmond Palace, between two and three in the morning.

Answer 2

Macbeth was indeed beheaded, but it was not as a judicial sentence. He was defending his kingdom and his throne from an army of Englishmen supporting an attempt by Malcolm Canmore to take over the country. In the course of the battle, Macbeth was faced by MacDuff, who defeated him and cut off his head as part of the fight. MacDuff wanted revenge against Macbeth because he killed MacDuff's wife and son. One might say that the fact that Macbeth committed murder in order to become king led to his being beheaded, for otherwise he would very possibly never have been the king and never have had to defend his crown from an usurper.

Answer 3

For waging war against Parliament, particularly in the Second Civil War (1648). He'd been spared after his first defeat: in taking up arms again he was considered to have acted treasonably.

Answer 4

She was accussed of adultery against King Henry VIII after several male children she bore died not long after birth. She was convicted of treason.

Answer 5

Because St. Thomas More opposed Henry VIII's break from the Catholic Church.