Given the task definition and input, reply with output. 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.

After a successful attack by the Saxons against this man, he retaliated by executing 4500 Saxons in a single day. His focus on the destruction of Pamplona led to his inability to capture Zaragoza. He put down a revolt by Hunald, and distaste with his wife Fastrada led to a minor revolt by Pepin the Hunchback. This ruler's court was centered around a unique octagonal chapel at the royal capitol of Aachen, where this ruler died after bathing in the warm springs. The brother of Carloman and son of Pepin the Short, FTP, identify this second Carolingian king, crowned emperor of the Romans by Pope Leo III in 800, with a name meaning Charles the Great.
History