Holy Lance
The Holy Lance, also known as the Lance of Longinus (named after Saint Longinus), the Spear of Destiny, or the Holy Spear, according to the Gospel of John, is the lance that pierced the side of Jesus as he hung on the cross.
Instrument of Jesus' crucifixion
In his First Apology, 55 Justin refers to various objects as shaped like the cross of Christ: "The sea is not traversed except that trophy which is called a sail abide safe in the ship … And the human form differs from that of the irrational animals in nothing else than in its being erect and having the hands extended, and having on the face extending from the forehead what is called the nose, through which there is respiration for the living creature; and this shows no other form than that of the cross (σταυρός)."
The apocryphal Acts of Peter, of the second half of the 2nd century, attaches symbolic significance to the upright and the crossbeam of the cross of Jesus: "What else is Christ, but the word, the sound of God? So that the word is the upright beam ("to orthon xulon") whereon I am crucified. And the sound is that which crosseth it ("to plagion"), the nature of man. And the nail which holdeth the cross-tree unto the upright in the midst thereof is the conversion and repentance of man."