Encyclopedias, Almanacs, Transcripts, and Maps
- Synagogue Council of America, The
- Synagogue, The Great
- Synagogues, Ancient
- Synaxary
- Syncretic Sects: Three Teachings
- Synderesis
- Synesius of Cyrene
- Syngalowski, Aron
- Synod of Bishops
- Synod of Bishops (Assemblies)
- Synods
- Synods, Early Church
- Syntagma Canonum Antiochenum
- Syon, Abbey of
- Syria, The Catholic Church in
- Syriac Language and Literature
- Syrian Christianity
- Syrian Liturgy
- Syrkin, Joshua
- Syrkin, Marie