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 book "Crucifixion in Antiquity", Gunnar Samuelsson declares that, while the New Testament terminology is in itself not conclusive one way or another for the meaning of the word, "[t]here is a good possibility that σταυρός, when used by the evangelists, already had been charged with a distinct denotation − from Calvary. When, e.g., Mark used the noun it could have meant 'cross' in the sense in which the Church later perceived it. [...] The Gospel accounts probably show that σταυρός "could" signify "cross" in the mentioned sense, but they do not show that it always did so." In his Q and A page he adds: "(The Gospels) do not describe the event in length [...] The non-detailed accounts of the Gospels do not, however, contradict the traditional understanding. So the traditional understanding of the death of Jesus is correct, but we could acknowledge that it is more based on the eyewitness accounts than the actual passion narratives."