The Catholic Church reports that in addition to the Shroud, several other relics of Jesus may be preserved. These include:
the head cloth reported in the tomb (The Sudarium of Oviedo, Spain),
His seamless tunic (the Holy Tunic of Argenteuil outside of Paris or, alternately, the Holy Coat called ‘Heilige Rock’ in Germany),
the spear that pierced his side (the Holy Lance of Longinus),
the cup of the last supper (the Great Chalice of Antioch),
the three nails,
one-third of the wooden board with the inscription nailed over Chirst's head (the Titulus),
and enough pieces of the true cross to make up about 2/3rds of the Patibulum (the cross piece).
All of these have varied provenance. The ones most likely to be authentic are the Sudarium of Oviedo and the Titulus, followed by the Holy Tunic of Argenteuil, which has blood stains of type AB that seem to match the pre-crucifixition scourging wounds of the Shroud.