rdfs:comment
| - By the terms of the Treaty of Viterbo, the Angevins of the Kingdom of Naples had inherited the Principality of Achaea upon the death of William II Villehardouin in 1278. They had, for some time, granted it to William's older daughter, Isabella of Villehardouin, to rule. However, they remained feudal overlords of the Principality and retook in 1307, due to the misgovernment of Isabelle's husband Philip of Savoy. In 1312, on the death of Isabelle, her younger sister, Margaret, claimed the Principality under the terms of her father's will, which conflicted with the Treaty of Viterbo.
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abstract
| - By the terms of the Treaty of Viterbo, the Angevins of the Kingdom of Naples had inherited the Principality of Achaea upon the death of William II Villehardouin in 1278. They had, for some time, granted it to William's older daughter, Isabella of Villehardouin, to rule. However, they remained feudal overlords of the Principality and retook in 1307, due to the misgovernment of Isabelle's husband Philip of Savoy. In 1312, on the death of Isabelle, her younger sister, Margaret, claimed the Principality under the terms of her father's will, which conflicted with the Treaty of Viterbo. The Angevins, as part of a complex marital pact and transfer of rights, arranged the marriage of Isabelle's eldest daughter, Matilda of Hainaut, to Louis of Burgundy in 1313, and invested the couple with the Principality. Margaret of Villehardouin, for her own part, arranged the marriage of her daughter, Isabelle de Sabran, to Ferdinand of Majorca, a member of the House of Aragon and opponent of the Angevins.
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