Unseen civilizations

This page lists all civilizations that have been unseen by humans. Most of them knew enchanting and horse riding.

Builders of the underground dungeons
They were able to build monster spawners. They had access to some music discs.

Builders of the abandoned mine shafts
It is possible they were the same people as the dungeon builders, because some dungeons are seen connected to their mine shafts.

Builders of the desert temples and wells
These people knew how to make TNTs and dyed materials.

Builders of the underground strongholds
This civilization were master miners and builders. They had great knowledge of Ender, as they were able to build End portals.

Builders of the Nether fortresses
They were capable of growing Nether wart and had access to normal Overworld minerals. They may have been pigmen.

Builders of the jungle temples
These people also knew how to use redstone.

Builders of the sea temples and creators of the guardians
It is possible they were only capable of living underwater. They had knowledge of golemancy, especially guardians.

Builders of the End cities
Probably the people who came to the End from the Overworld. They've built wondrous tree-like cities and air-ships. They knew alchemy, and used beetroot as the main source of food. They learned how to utilize the omnipresent chorus plant to build their cities. They managed to kill the ender dragon.