- Rueda, Rodrigo de, active 1553-15691
- Rufina, Saint, -approximately 2871
- Sacraments--Catholic Church1
- Saints1
- Salt industry and trade--Law and legislation1
- Sanchez de Bustamente, Luis1
- Sancho Garcés I, King of Navarre, -9251
- Sancho IV, King of Castile and Leon, 1257-12951
- Seals1
- Seals (Numismatics)1
- Seals, wax1
- Sepúlveda, Juan Ginés de, 1490-15731
- Sermons, Latin1
- Sermons, Nahuatl1
- Sermons, Spanish1
- Sermons, Tzeltal1
- Shipwrecks1
- Silver clasp plates1
- Silver mines and mining1
- Slavery1