Boncompagni was the obvious candidate. He was acceptable to Cardinal Borromeo and the reformers. He was a successful nuncio in Spain, and was acceptable to the Spanish faction, which included Naples. The Conclave turned out to be a very short one. On 14 May, Ugo Boncompagni was elected pope, and took the name Gregory XIII. He was crowned by Cardinal Ippolito d'Este, the senior Cardinal Deacon, on 20 May 1572. Cardinal d'Este, one of Alessandro Farnese's favorite enemies, died on 2 December 1572.