The Treasury is a repository for Chests in Don't Starve Together, accessed through the Item Collection option in the Main Menu. Chests contain 4 random Curios each, which correspond with their respective Events.
Curio Chests drop in place of items matching their rarity during certain periods. Pugna's War Chests and The Gnaw's Chests can also be earned by leveling up during The Forge and The Gorge events, respectively.
Common Classic Curio Chest Default
Common Pugna's War Chest The Forge This chest contains 4× Forge Event curios.
Classy Winter's Feast Chest Winter's Feast (2017 and after) This chest contains 4× Winter's Feast curios.
Classy Spring Chest Year of the Varg This chest contains 4× spring curios.
Common The Gnaw's Chest The Gorge This chest contains 4× Gorge Event curios.