This is Brick Complex

Brick complex is a mod that adds a new structure into the game called brick complex

it is simullar to a stronghold but made with bricks

it was made with MCreator, a program that lets you create mods for minecraft.

here is some info about the structure (contains spoilers and secrets)

each structure contains one room with a piramid (the main piece of the structure)

hallways and rooms

hallways come in mutiple variants

straith, corner, T piece, X piece, door hallway (only straith), four starcase pieces and some more

rooms have two sizes

small and big

big rooms connect to hallways and their interior is a seperate structure that is placed inside the room

they come in four variants

1 door, 2 doors (both on opposite sides), 3 doors, 4 doors

and there are like 8 diffirent interiors for them

small rooms attach to doors in door hallways

they always have one door and come in four variants

8x8x8 room, 8x6x8 room, room with slanted ceiling (using stairs), and 8x8x8 with hidden chest in ceiling (6x3x6 on inside)

there are interiors for them too and a lot more variants with diffirent kinds of stuff

the structre uses some of the minecraft loot tables like woodland mansion, stringhold coorridor and library, and there are two new loot tables added by this mod. one is just some potion related items while the other one is for a music room and gives you some music discs.

you can also find damaged walls in the structrure whitch are blocked off coriddors and / or dead ends with chests

and the center piramid contains 8 diamond blocks inside (you need to break it to get them)

this structure is really compex, spawns only in mountains, has jigsaw generation depth of 20 and maximum distance from structure of 116