- Orders of knighthood and chivalry2
- Ordnance--Manufacture2
- Ospedale di San Bartolomeo (Florence, Italy)2
- Paul III, Pope, 1468-15492
- Peasant uprisings2
- Peru--Cuzco2
- Petrucci, Pandolfo, 1452-15122
- Piccolomini della Triana, Silvio, 1878-19622
- Pius V, Pope, 1504-15722
- Poland2
- Political science2
- Portugal--Lisbon2
- Power of attorney2
- Prescriptions, formulae, receipts, etc.2
- Printed waste2
- Protestants2
- Relations2
- Romania--Transylvania2
- Salt industry and trade--Law and legislation2
- San Marziano (Monastery : Tortona, Italy)2