Alexander III. releases the Subjects of Frederick Barbarossa from their Allegiance.—His Character.—Submission of Frederick.—The Third Lateran Council.—Decree authorizing Waldenses and Albigenses to be put to Death.The Thirteenth Century.—Innocent III.—His Ambition and Usurpation.—His Claim of Divine Power.—He releases the Subjects of Otho from their Allegiance.—His Bull to put the Vaudois to Death.—The Inquisition.—Boniface VIII.—His Bull Unam Sanctam.— He caused a New Body of False Decretals to be composed.—Opposition of the Gallican Church.