Crown and crossed keys above Medici Arms, .LEO. PAPA. .DECIMVS / Saints Paul and Peter standing, mintmaster's mark - trident and annulet below; ALMA ROMA. Ber.631, Fr.47. Son of Lorenzo il Magnifico, Leo X was a great patron of the arts. To finance Bramante's new St. Peters as well as other building projects, he granted indulgences to donors. This provoked Martin Luther to post his Ninety - Five Theses, thus ushering in the Protestant Reformation. PCGS MS 62.