Monarchy of the United Kingdom children, she was succeeded by the Scottish monarch James VI, who was the great-grandson of Henry VIII's older sister and hence Elizabeth's first cousin twice removed. James VI ruled in England as James I after what was known as the "Union of the Crowns". Although England and Scotland were in personal union under one monarch – James I became the first monarch to style himself "King of Great Britain" in 1604 – they remained two separate kingdoms. James I's successor, Charles I, experienced frequent conflicts with the English Parliament related to the issue of royal and parliamentary powers, especially the
Edward I of England period. They limited themselves to general comments on Edward's significance as a monarch, and echoed the chroniclers' praise for his accomplishments. During the 17th century, the lawyer Edward Coke wrote extensively about Edward's legislation, terming the King the "English Justinian", after the renowned Byzantine lawmaker, Justinian I. Later in the century, historians used the available record evidence to address the role of parliament and kingship under Edward, drawing comparisons between his reign and the political strife of their own century. 18th-century historians established a picture of Edward as an able, if ruthless, monarch, conditioned by the circumstances of his own