Infinity Gauntlet

The Infinity Gauntlet is a key item in Odin's Vault.

Odin's Vault
The Gauntlet was in Odin's Weapon Vault, and was guarded by the Destroyer.

Retrieval by Thanos
Given that both Loki and Ronan the Accuser failed him in his quest to find the Infinity Stones, Thanos retrieved the gauntlet and decided to hunt for the Stones himself.

Trivia

 * In the comics, the Infinity Gauntlet, when holding the Infinity Stones, grants the bearer infinite powers when used within the universe of its origin.
 * It is known that the Tesseract, the Scepter, the Aether and the Orb are Infinity Stones, used in the comics in conjunction with the Infinity Gauntlet. It is highly likely that they will be used with the Gauntlet in Avengers: Infinity War.
 * It is likely that the stones shown in the Gauntlet are fakes created by Asgardians to show how the item is supposed to look, given that in Thor: The Dark World it is confirmed that the only Infinity Stone Asgard has in its possession is the Tesseract.
 * In Thor, the Gauntlet is depicted as being worn on the wielder's right hand, while in the Avengers: Infinity War teaser, it is depicted as being worn on the wielder's left hand, like in the comics.

Behind the Scenes

 * The Infinity Gauntlet prop from Thor was showcased at Comic Con 2010, while Josh Brolin entered the stage wearing an Infinity Gauntlet fake glove at Comic Con 2014.