Charles I of England

Charles I (19 November 1600 – 30 January 1649) was King of England, Scotland and Ireland from 1625 to his death.

During the English Civil War, he was defeated by the Oliver Cromwell and beheaded. Following his death, Scotland proclaimed his son, Charles II, to be his successor. However, it would be years before the monarchy reclaimed the English throne.

Reference

 * Assassin's Creed: Project Legacy - Holidays: Chapter 1 - Ghosts of Christmas Past