One of the most iconic props in Marvel history, and probably movie history, is the Infinity Gauntlet. We see a lot of it through the later movies in the MCU as Thanos forged it to hold the Infinity stones. However, its first appearance is much earlier, and you might not have noticed it at the time.
All the way back in 2011, when we take a walk with Thor through his father, Odin’s vault, we come across many priceless and dangerous artifacts that Asgard is keeping safe from the world. Amongst these, in the background, observant viewers could see the Infinity Gauntlet, sitting undisturbed.