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- Sunday of St. Mary of Egypt
- Sunday of St. Thomas
- Sunday of the Fathers
- Sunday of the Fathers of the First Six Councils
- Sunday of the Fathers of the Seventh Ecumenical Council
- Sunday of the Forefathers
- Sunday of the Holy Cross
- Sunday of the Last Judgment
- Sunday of the Prodigal Son
- Sunday of the Publican and Pharisee
- Superior
- Supersessionism
- Suprasl Monastery
- Supraśl Monastery
- Surplice
- Susanna
- Susanna (disambiguation)
- Susanna the Myrrh-Bearer
- Susanna the Virgin
- Suspension