1552-1634. Lord Chief Justice of England 1613-17. He was a defender of common law against royal prerogative; against Charles I he drew up the Petition of Right 1628, which defines and protects Parliament's liberties. Coke was called to the Bar in 1578, and in 1592 became speaker of the House of Commons and solicitor-general. As attorney-general from 1594 he conducted the prosecution of Elizabeth I's former favourites Essex and Raleigh, and of the Gunpowder Plot conspirators. In 1606 he became Chief Justice of the Common Pleas, and began his struggle, as champion of the common law, against James I's attempts to exalt the royal prerogative. An attempt to silence him by promoting him to the dignity of Lord Chief Justice proved unsuccessful, and from 1620 he led the parliamentary opposition and the attack on Charles I's adviser Buckingham. Coke's Institutes are a legal classic, and he ranks as the supreme common lawyer.