Encyclopedias, Almanacs, Transcripts, and Maps
- Popes, Election of
- Popes, List of
- Popes, Names of
- Poppaea, Sabina°
- Poppe, Edward Johannes Maria, Bl.
- Popper
- Popper Bozian, Wolf
- Popper, David
- Popper, Josef
- Popper, Julius
- Popper, Siegfried
- Popper, Sir Karl
- Popper, William
- Poppers (Popers), Jacob ben Benjamin Hakohen
- Poppers, Meir ben Judah Loeb Ha-Kohen
- Poppo of Stavelot, St.
- Popular Piety, Hispanic, in the United States
- Popular Piety, Polish
- Populorum Progressio
- Porat, Orna