Encyclopedias, Almanacs, Transcripts, and Maps
- Siboni
- Sibyl and Sibylline Oracles
- Sibyllina Biscossi, Bl.
- Sicardus of Cremona
- Sicarii
- Sichar
- Sicher, Gustav
- Sichrovsky, Heinrich von
- Sick Care, Communal
- Sick, Prayer for
- Sick, Visiting the
- Sid (Sidilyo; Sirilyo), Samuel Ibn
- Sidney, Sylvia
- Sidon, Karol Efraim
- Sidon, Simeon
- Sidonius Apollinaris, St.
- Sidrah
- Siebert, Muriel
- Siedenburg, Frederic
- Siedlce