Spada was the patron of
Martha Marchina, an Italian soapmaker who wrote poetry in Latin, for ten years. Spada recognized her literary talents after exchanging epigrams about the plague that was ravaging Italy at that time. Spada was largely responsible for the publication of
Musa Posthuma, a collection of Marchina's poetry, though it was first published after his death in 1662. Spada included some of his own poetry, including a dedicatory poem written in Latin, addressed to the former queen of Sweden, Christine. Several of Spada's letters to Marchina and to his brother Vergilius Spada are also included in
Musa Posthuma, which are written in Italian and Latin. Several of Marchina's poems written about Spada are also included in the book. ==Episcopal succession==