Narsil

Narsil is the sword wielded by Elendil, one of the Kings of Gondor and briefly, by Isildur.
Elendil held it with him until his death during the Last Alliance of Men and Elves. Isildur attempted to wield the sword after his father's death. However, it was broken in half and smaller pieces when Isildur attempted to lift it but Sauron stepped on it. Isildur used the blade that had remained on the handle and severed Sauron's finger that had the One Ring on it
The shards were collected by Elrond, who kept it on a pedestal and near a painting of Sauron's defeat.
== The Hobbit: An Unexpected Journey ==
When Bilbo is exploring Rivendell, he came across Narsil's shards, but he was more mesmerized by the painting of the Ring.
== The Lord of the Rings: The Return of the King ==
Arwen persuades Elrond to have the sword re-forged by the elves, and Elrond in turn persuades Aragorn to accept it, as the symbol of kingship with which he can command obedience from the Army of the Dead.