In this task you will be given a text passage from a trivia quiz. You should choose the category this question belongs to from these categories: History, Science, Social Science, Fine Arts, Literature. You can only choose one category, so if in doubt, please choose the closest match.
Q: Francis Maitland has claimed that a treatise written by Richard, grand-nephew of Roger the Poor, was "one of the most wonderful things" of this man's reign. In addition to the Dialogus de Scaccario, other economic developments of his reign include the development of the possessory writ and the practice of scutage, in which men could pay their way out of military service. This man also attempted to reassert the supremacy of the state over the church in the Constitutions of Clarendon. FTP, name this Plantagenet king of England, famous for his clashes with Archbishop Thomas Beckett, and his marriage to Eleanor of Aquitaine.
A:
History