Detailed Instructions: 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: John of Procida traveled to this region to stir up anger against its ruler. This region was given to Boniface VIII by the Treaty of Anagni, which affirmed the earlier Treaty of Tarascon. A ruler of this region married the daughter of Henry II, Joan of England; that man was William the Good. This region was once led by William the Bad, who was the son of a king of it. That king was excommunicated by Innocent II at the Second Lateran Council and was Roger II. Michael VIII Palaeologus refused to aid the ruler of this region, Peter of Aragon, without papal approval. A rebellion in this region was ended by the Peace of Caltabellotta and was against the man that Louis IX had placed in charge of it, Charles of Anjou. For 10 points, a rebellion on what Italian island is known as its "Vespers"
A:
History