Title: Sanctissimi Domini Nostri Pii Divina Providentia Papae IX litterae apostolicae quibus indicitur oecumenicum cdncilium Romae habendum
Subjects: Vatican Council (1st : 1869-1870 : Basilica di San Pietro in Vaticano) (uri) http://id.loc.gov/authorities/names/n50000581 (uri) http://viaf.org/viaf/sourceID/LC|n50000581