Author
- Maurice de Sully1
- Muretus1
- Naldo Naldi1
- Niccolò Balsamo1
- Nicholas Langlois1
- Nicolò Peranzone1
- Oglerio di Lucedio1
- Otto III1
- Paschasius Radbertus1
- Patrick Graham, 1st Lord Graham1
- Paul III1
- Paul IV1
- Paul, of Cologne1
- Pedro Henrique de Bragança1
- Pedro de Serra1
- Peter Cantor1
- Peter Olivi1
- Petronia Lancenberg1
- Petrus Veronensis1
- Pier Paolo Vergerio the Elder1