In the Holy of Holies, next to the Ark, a number of items were placed as testimony for future generations: a jar of Manna, a jar of anointing oil, Aaron's staff that blossomed with almond flowers, and the box that the Philistines sent when they returned the Ark to Israel. These things were hidden together with the Ark towards the end of the First Temple period. 
Uses
Contents:   Part I,    Part II,    Part III,    Part IV,    Part V,    Part VI,    Part VII