Fifty-four cardinals participated in the conclave which took place from 19 July to 6 August, following the death of Gregory XV. Among them were four Spanish cardinals and three German cardinals, but none from France. The cardinals were primarily split in factions between those created by popes before
Pope Paul V was elected in 1605, who numbered thirteen, those created by Paul, who numbered thirty-two, and those created by Gregory XV, who numbered nine. The two cardinals who had the most influence over the conclave were
Scipione Borghese, the nephew of Paul V, and
Ludovico Ludovisi, the nephew of Gregory XV. Ludovisi attempted to increase his influence over the conclave by becoming allies with the cardinals who originated from regions controlled by the
Habsburgs. Borghese had supported
Pietro Campori in the previous conclave, which had elected Gregory XV, and Campori was his preferred candidate during this conclave as well. It was anticipated that Campori's age of 66 would be a benefit, because a Spanish memorandum had revealed that they viewed older cardinals as less likely to develop an independent foreign policy as pope. Because the French influence in this election was not expected to be much, Borghese anticipated that electing Campori pope would be easier, since French opposition had been the main thing preventing it in the previous conclave. The first scrutiny of the conclave was significant because it revealed that Gregory XV's reform intended to discourage cardinals from voting for their friends in the first round had not been successful. The second scrutiny revealed to Borghese that
Giovanni Garzia Mellini was the candidate from the Borghese party that had the most support among electors. Ludovisi was opposed to Mellini, and he spread rumours amongst the cardinals that Borghese would rather die than see anyone outside of his faction becoming pope. These rumours caused other cardinals to lose good will towards Borghese, coupled with the alleged fact that the summer heat had begun to exhaust them. ==Election of Urban VIII==