From Starbounder - Starbound Wiki
Ancient Chest is an object unobtainable by players through normal means. This item's information is present in the game files, but not intended by developers to be in players' possession.
Ancient Chest is a Storage object found only in Challenge Rooms and Ancient Vaults.
It has 16 storage slots and is not stackable.
|Apex :||An extremely old chest. It could contain anything.|
|Avian :||This chest looks to be very old indeed.|
|Floran :||Floran curiousss... what could be in ssstrange box?|
|Glitch :||Cautious. The structure of this chest is impenetrable to my sensors.|
|Human :||That is one old looking chest.|
|Hylotl :||This chest has an unfamiliar design, I am unable to determine its maker.|
|Novakid :||It's a wonder this chest is still standin' after all this time.|
- Spirited Giraffe: Added