
Modrinth · Minecraft mod
Citadel
A Lightweight Library
Quick answer
Which Citadel release should I use?
Citadel 2.7.1 targets 1.21, 1.21.1, 1.21.2 with NeoForge. Installation on the client is optional. Installation on the dedicated server is optional. No extra mods listed for this file.
Where it goes
Is Citadel required on the client, server, or both?
Installation on the client is optional. Installation on the dedicated server is optional.
The source marks this as usable on both the client and server.
What else does Citadel 2.7.1 need?
2.7.1. Change the file and its required mods may change too.
This file does not list any required mods. Do not add a library just because a different file uses it.
This file does not list any required or optional mods.
Before you install it
Add Citadel without breaking your instance.
Built for Citadel 2.7.1. Pick another file and the loader, install side or required mods may change.
- 01
Stick to this file
Use 2.7.1. It targets 1.21, 1.21.1, 1.21.2 with NeoForge; another release may have different loader, side or dependency requirements.
- 02
Bring the mods it needs
This file does not list any required mods. Do not add a library just because a different file uses it.
- 03
Put it on the correct side
Installation on the client is optional. Installation on the dedicated server is optional.
- 04
Pick the file you checked
Use the “Get this file” button beside 2.7.1. It opens that exact file at the source.
About this project
What does Citadel add?

"My analysis of historical data suggests an 97.34% probability that you are aware of my birth on your planet, and my rebirth into beauty on Citadel Station." -System Shock 2
Citadel is a Library mod required for advanced animations and entity properties in 1.14 and beyond. Citadel, being a Library, does not add many features by itself, but rather provides a frame work for other mods when it comes to animating entities, loading .tbl Tabula and .obj Waveront models, and for keeping track of entity properties. Citadel's predecessor, LLibrary, will no longer be updated from 1.12.2, and from now on all of my mods will use Citadel. Citadel's code base is largely derived from LLibrary, and the code is used with permission from Gegy1000, the maintainer of LLibrary and its author in recent versions.
In versions 1.6.3 and above, there is also a config option for changing the cap on how many mobs spawn on chunk generation. This is useful when used with the many mob mods that require Citadel, as without changing this they can make it quite difficult to find vanilla mobs.
Developers who want to use Citadel can read the guide on how to add it to their development environment.
Project description from Modrinth.
Pick your setup
Citadel by Minecraft version and loader
Choose the version and loader you play, then open the matching release.
1.21.10
1 loader build1.21.9
1 loader build1.21.8
1 loader build1.21.7
1 loader build1.21.6
1 loader build1.21.5
1 loader build1.21.4
1 loader build1.21.3
1 loader build1.21.2
1 loader build1.21.1
1 loader build1.21
1 loader buildShowing the newest 12 of 21 game versions. Older files are in the list below.
Check the dependencies, then try the file in a copied instance before changing a world you care about.
Recent files
Citadel versions and loaders
2.7.1
citadel-2.7.1-1.21.1.jar
18 Jul 2026
2.7.0
citadel-2.7.0-1.21.1.jar
17 Jan 2026
2.6.3
citadel-2.6.3-1.20.1.jar
17 Jan 2026
2.6.2
citadel-2.6.2-1.20.1.jar
27 Jun 2025
2.6.1
citadel-2.6.1-1.20.1.jar
18 Dec 2024
2.6.0
citadel-2.6.0-1.20.1.jar
15 Aug 2024
2.5.7
citadel-2.5.7-1.20.1.jar
14 Aug 2024
2.5.6
citadel-2.5.6-1.20.1.jar
23 Jul 2024
2.5.4
citadel-2.5.4-1.20.1.jar
28 Feb 2024
2.5.3
citadel-2.5.3-1.20.1.jar
2 Feb 2024
2.5.2
citadel-2.5.2-1.20.1.jar
28 Jan 2024
2.5.1
citadel-2.5.1-1.20.1.jar
28 Jan 2024
Looking for an older file? The official Modrinth project page is in Resources.