ModsJava
City of Chambers
Java mod listed for Minecraft 1.21. Downloads from the MC Java Mods app on Android.
City of Chambers adds a big flying structure in the air like the end city. ( it's only changed in to a trial chamber! )
I don't know my version or loader
Open the Minecraft launcher and look at the profile you play on — it names both, like fabric-loader-1.21.4. The version also shows in the bottom-right corner of the game's main menu.
No loader in the profile name? Then it's plain Minecraft, and these mods won't run — you need Fabric or NeoForge installed first.
Brand New Discord Server! For Private Support and Update Alerts.
Explore the City of Chambers, a mysterious big structure brimming with trials, treasures, Inspired by the iconic End Cities, the City of Chambers is a fortress-like structure filled with unique rooms, and rewarding challenges designed to test even the bravest adventurers.
Compaible and Required:
Lootr (Forge & NeoForge)
Recommend: 
Stackable127
Sophisticated Backpacks
Fabric 1.21.8 + Planned.
NeoForge 1.21.8 + Planned.
No Forge 1.21 or higher.
Don't forget to check out my other mods on my profile!
Loot gen: all chests contain expensive loot and are loaded when you load the chunk.
Structure gen: city of chambers spawns higher than 100+
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Multi-Level Tower: The city consists of multiple levels, each containing a Trial Chamber with different themes, mobs, and challenges. No floors are the same, keeping the gameplay exciting and unpredictable.
Defend by trial spawners!
Clear the tower and obtain the 2x mace!
Fight the minecraft mobs in the tower: bogged, breeze, and more!
This mod is created with: intellij
Disclaimer about product: NOT AN OFFICIAL MINECRAFT PRODUCT. NOT APPROVED BY OR ASSOCIATED WITH MOJANG OR MICROSOFT
Quick facts
- Edition: Minecraft Java
- File type: .jar
- Minecraft versions listed: 1.21.8, 1.21.1, 1.21
- How to install: Install the matching mod loader (Forge, Fabric or NeoForge) for your Minecraft version. → Download the .jar. → Put it in the .minecraft/mods folder and launch that loader profile.
- Where to get it: Opens on CurseForge — not every file is mirrored on our own servers.
Install steps are the general flow for this file type — How to install Minecraft Java mods & modpacks walks through it step by step.
File checked by MCModsHub
- Ships as city_of_chambers-1.0.13-fabric-1.21.8.jar — drop this file into the mods folder
- Download size: 817 KB
- Download link checked 28 Sept 2026 — working
These come from our own check of the pack file, not from the source page.