Azzolini, Decio (surnamed the younger), an Italian prelate, was born at Fermo, in the States of the Church, in 1623. He became cardinal in 1664, and died at Rome in 1689. He wrote Eminentissimi Cardinalis Azzolini Aphorismi Politici, translated into Latin by Henning (Osnaburg, 1691). We find in Muratori and Crescimbeni' poems by Azzolini. See Hoefer, Nouv; Biog. Generale, s.v.