- Requesens, Luigi de'1
- Requesens, Salvatore Francesco de'1
- Requesens, Salvatore de'1
- Requesens, Vincenzo de'1
- Roderick, King of the Visigoths, -711?1
- Rodriguez, Ysabel1
- Rodríguez, Sebastián, 1896-19681
- Romances, Spanish1
- Rufina, Saint, -approximately 2871
- Saints1
- Salt industry and trade--Law and legislation1
- Sancho Garcés I, King of Navarre, -9251
- Sancho IV, King of Castile and Leon, 1257-12951
- Seals (Numismatics)1
- Seals, wax1
- Sepúlveda, Juan Ginés de, 1490-15731
- Sermons1
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- Sermons, Nahuatl1
- Sermons, Spanish1