Born Francesco Xaverio Castiglione, pope from 1829–1830, a mere twenty months of reign. LS in Italian, signed “F. S. Card Castiglioni,” one page, 7.5 x 9.5, May 7, 1823. Crisply penned untranslated letter, signed as cardinal. Second integral page bears an address panel in another hand to an address in Pisa. Intersecting folds, and some scattered toning, otherwise fine condition. Pre-certified PSA/DNA and RRAuction COA.
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