Lance of Longinus
Talk about it here.
The Lance of Longinus, also known as the Spear of Destiny and Gungnir, was the weapon which pierced the side of Jesus Christ during his crucifixion on Golgotha. Throughout history, the lance was highly sought after. (COMIC: Project Longinus)
In 33, when Jesus Christ hung on the cross, a Roman soldier named Longinus drove his lance into Jesus' side to see if he was dead. Shortly afterwards, the lance went missing. (PROSE: The Spear of Destiny)
In 1938, a lance which may have been the Longinus was kept in a Vienna museum. When Adolf Hitler invaded Austria, he took the lance back to Berlin. Although he possessed the spear throughout World War II, the Nazis still lost. (PROSE: The Spear of Destiny) Some people - including Nimrod - believed that this lance was a 13th century fake. (PROSE: The Spear of Destiny, COMIC: Project: Longinus) The Doctor believed that it may have been the real lance and that it had no effect on Hitler because he rarely physically held it. (PROSE: The Spear of Destiny)
In 1973, the lance was kept in the Moxon Collection. Under orders from the High Council, the Third Doctor and Jo Grant tried to replace the lance with a decoy and destroy the real one, but they unable to due to the advanced security. They decided to go back in time and replace the lance in the past. (PROSE: The Spear of Destiny)