The theca houses the following relics:
Relics of Christ's Life and Passion:
- Of the Column of Flagellation (Ex Columnae D.N.J.C.),
- Of the Holy Manger (Ex Cunis D.N.J.C.),
- Of the Holy Bandages (Ex Fascia D.N.J.C.),
- Of the Sepulcher of Christ (Ex Sepulchre D.N.J.C.).
Relics of the Holy Family:
- Of St. Joseph, Spose of the Blessed Virgin Mary;
- St. Anne, Mother of the Blessed Virgin Mary;
- Of the Sepulcher of the Virgin Mary (Ex Sepulchre B.V.M.);
- St. Joachim Father of the Blessed Virgin Mary.
Relics of the Apostles and Evangelists:
- St. Peter Ap.,
- St. Paul Ap.,
- St. Andrew Ap.,
- St. Barnabas Ap.,
- St. Philip Ap.,
- St. Bartholomew Ap.,
- St. James the Great Ap.,
- St. James the Less Ap.,
- St. Jude Thaddeus Ap.,
- St. Simon, Ap.,
- St. Luke the Evangelist,
- St. Mark the Evangelist,
- St. John Ap. & Evangelist,
- St. Matthew Ap. & Evangelist,
Relics of Saints and Martyrs:
- St. Andrew Avellino,
- St. Ursula Virgin & Martyr,
- St. Lucia Virgin & Martyr,
- St. Anthony of Padua,
- St. Irena Virgin & Martyr,
- St. Mary Magdalene,
- St. Dismas the Good Thief,
- St. Francis de Sales,
- St. Francis Xavier,
- St. Francis Borgia S.J.,
- St. Gaetano dei Conti di Thiene,
- St. Blaise Bishop of Sebastea & Martyr,
- St. Stanislaus Kostka S.J.,
- St. John Francis Regis S.J.,
- St. Aloysius Gonzaga S.J.,
- St. John de Goto S.J., Martyr of Japan
- St. James Kisai S.J., Martyr of Japan
- St. Paul Miki S.J., Martyr of Japan
- St. Theresa of Avila