[1] In Viterbo he was able to suppress a revolt by the Maganza faction, imprisoning and executing Alessio de Tignosi.
[1] In the consistory of 18 December 1461, Pope Pius II made him a cardinal priest while Rovarella was in his legation to Naples.
[1] On 13 February 1464 he returned to the Kingdom of Naples, where he supported Ferdinand of Aragon against René of Anjou.
[1] Cardinal Roverella returned to Rome on 23 August 1464, and participated in the papal conclave of 1464 that elected Pope Paul II.
[1] He returned to Rome on 1 August 1471 to participate in the papal conclave of 1471 that elected Pope Sixtus IV.