Born at Rome, 6 May, 1574; died there, 7 January, 1655. <...>
On 9 August, 1644, a conclave was held at Rome for the election of a successor to Urban VIII. The conclave was a stormy one. The French faction had agreed to give their vote to no candidate who was friendly towards Spain. Cardinal Firenzola, the Spanish candidate was, therefore, rejected, being a known enemy of Cardinal Mazarin, prime minister of France. Fearing the election of an avowed enemy of France, the French party finally agreed with the Spanish party upon Pamfili, although his sympathy for Spain was well known. On 15 September he was elected, and ascended the papal throne as Innocent X. <...>
Soon after his accession, Innocent found it necessary to take legal action against the Barberini for misappropriation of public moneys. To escape punishment Antonio and Francesco Barberini fled to Paris, where they found a powerful protector in Mazarin. Innocent confiscated their property, and on 19 February, 1646, issued a Bull ordaining that all cardinals who had left or should leave the Ecclesiastical States without papal permission and should not return within six months, should be deprived of their ecclesiastical benefices and eventually of the cardinalate itself. The French Parliament declared the papal ordinances null and void, but the pope did not yield until Mazarin prepared to send troops to Italy to invade the Ecclesiastical States. <...>
In Italy Innocent had occasion to assert his authority as suzerain over Duke Ranuccio II of Parma who refused to redeem the bonds (monti) of the Farnesi from the Roman creditors, as had been stipulated in the Treaty of Venice on 31 March, 1644. The duke, moreover, refused to recognize Cristoforo Guarda, whom the pope had appointed Bishop of Castro. When, therefore, the new bishop was murdered while on his way to take possession of his see, Innocent held Ranuccio responsible for the crime. The pope took possession of Castro, razed it to the ground and transferred the episcopal see to Acquapendente. The duke was forced to resign the administration of his district to the pope, who undertook to satisfy the creditors. <...>
Innocent X was a lover of justice and his life was blameless; he was, however, often irresolute and suspicious. The great blemish in his pontificate was his dependence on Donna Olimpia Maidalchini, the wife of his deceased brother. For a short time her influence had to yield to that of the youthful Camillo Astalli, a distant relative of the pope, whom Innocent raised to the cardinalate. But the pope seemed to be unable to get along without her, and at her instance Astalli was deprived of the purple and removed from the Vatican. The accusation, made by Gualdus (Leti) in his "Vita di Donna Olimpia Maidalchini" (1666), that Innocent's relation to her was immoral, has been rejected as slanderous by all reputable historians.
Kilde: The Catholic Encyclopedia