Complex sentence: In 1605, Ferdinando succeeded in getting his candidate, Alessandro de' Medici, elected Pope Clement XI. Alas, he died the same month, but his successor, Pope Paul V, was also pro-Medici.
Split into simpler sentences: In 1605, Ferdinando succeeded in getting his candidate, Alessandro de'Medici, elected as Pope Clement XI. Alas, he died the same month. However, fortunately for the Medici, Clement's successor, Pope Paul V, was also pro-Medici.