- Rueda, Bernardino de, active 1553-15691
- Rueda, Luis de, active 1553-15691
- Rueda, Rodrigo de, active 1553-15691
- Rufina, Saint, -approximately 2871
- Sacraments--Catholic Church1
- Saints1
- Salt industry and trade--Law and legislation1
- San Miguel, Josefa de, active 1683-16851
- Sanchez de Bustamente, Luis1
- Sancho Garcés I, King of Navarre, -9251
- Sancho II, King of Castile and Leon, 1037 or 1038-10721
- Sarmiento, Pero. Sentencia-Estatuto1
- Satire1
- Satire, Spanish1
- Satires1
- Sea fiction1
- Sea stories, Spanish1
- Seals (Numismatics)1
- Seals, wax1
- Sepúlveda, Juan Ginés de, 1490-15731