Indulgence dated Apr. 29, 1587, for Alfonso di Giacomo d'Antonio Maria Piccolomini, duca di Montemarciano, in which Pope Sixtus
V granted permission for the building of a chapel in the ducal palace in Montemarciano.
Piccolomini Family Papers. Folder 93
Kislak Center for Special Collections, Rare Books and Manuscripts University of Pennsylvania Ms. Coll. 742
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