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The Treaty of Speyer was signed in 1209 by Holy Roman Emperor Otto IV. This agreement was developed as a result of Pope Innocent III having launched an appeal for organizing a crusade against the Cathars (or Albigensians) in southern France. ^[1] The accord allowed Emperor Otto IV to renounce the Concordat of Worms and claim authority over territories controlled by the Pope. These territories included the Kingdom of Sicily. ^[1]

See also

• List of treaties

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1. 1 2 Pascua Echegaray, Esther (2022-05-30), "Peace Treaties (Europe, 1000–1500)", Peace Treaties (Europe, 1000–1500), Routledge, doi:10.4324/9780415791182-rmeo405-1 , retrieved 2025-04-01