The communion of saints, when referred to persons, is the spiritual union of the members of the Christian Church, living and the dead, but excluding the damned. They are all part of a single "mystical
Revelation 5:8 presents the saints in Heaven as linked by prayer with their fellow Christians on earth
Medieval Credo Apostolorum, dated c. 1300 (Bibliothèque Mazarine ms. 0924 f. 150v). The sequence of attribution to the apostles is: 1. Peter, 2. Andrew, 3. John, 4. James, son of Zebedee,5. Thomas, 6. James, son of Alphaeus, 7. Philip, 8. Bartholomew, 9. Matthew, 10. Simon the Zealot, 11. Jude Thaddaeus, 12. Matthias.