1 Piastra - Innocenzo XI ERIT LIGATVM ET IN CÆLIS - St. Peter - Keys above Papal arms

Innocent XI — Benedetto Odescalchi — was elected in 1676 only after a conclave so deadlocked it lasted five weeks, with Louis XIV actively blocking his candidacy. Once in office, he became the primary financier behind the Holy League that halted the Ottoman advance at Vienna in 1683, contributing vast personal funds and papal treasury resources to the effort. This piastra was struck in the years immediately preceding that campaign, when Innocent was already systematically cutting Vatican court expenditures and redirecting revenue toward the Turkish threat.

His fiscal austerity made him genuinely unpopular in Rome. That political tension sits quietly in every coin of his pontificate.