5 Euros - Franciscus Circolo S. Pietro

The Circolo di San Pietro, founded in Rome in 1869, was established specifically to support Catholic charitable works in the wake of the Papal States' territorial collapse — a private lay organization stepping in as the Vatican's own temporal power contracted. The 2019 issue marks the association's 150th anniversary.

The KM#521a designation distinguishes this gold-plated variant from the standard silver release, a bifurcated issue strategy the Vatican mint has used with increasing frequency to serve both collectors and the commemorative gift market without minting separate dies.