sentences:  He had also received a cardinalate on Ferdinando's succession, but had dismissed it in 1616 to be able to marry his relative Isabella Gonzaga, daughter of Alfonso Gonzaga, Count of Novellara.Conscious of his unstable health, the childless Vincenzo set up a descendance for his lands through the marriage of his niece Maria (daughter of the former Duke Francis IV) with Charles of Nevers' son Charles of Gonzaga-Nevers.The elder Charles was a cousin of his father.