- 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
- Qurʼan2
- Relations2
- Romania--Transylvania2
- Salt industry and trade--Law and legislation2
- San Marziano (Monastery : Tortona, Italy)2
- San Miniato, Bartolomeo di2
- San Miniato, Francesco di2
- San Miniato, Simone di2
- Santa Trinità di Spineto (Monastery : Sarteano, Italy)2
- Seals (Numismatics)2
- Spain--Aragon2