|Can generate in
Yes, in chunks inhabited less than 3 minutes
Ocean monuments, also known as simply monuments, are rare underwater structures found in deep oceans biome and variants. They are inhabited by guardians and elder guardians. They are the only place where sponges can be found and one of the two places where prismarine can be found; the other being ocean ruins.
Ocean monuments generate in areas with deep ocean biome variants everywhere within a 16 block square radius around the center point, and an aquatic biome (regular/deep/frozen ocean, regular/frozen river) everywhere within a 29 block square radius around the center point. In order to prevent air pockets, water generates around the monument as a part of the structure. It is the largest structure that does not contain a loot chest and the largest water structure.
The area of the ocean monument spawns only guardians after generating, also being the only location they spawn. Ocean monuments always contain three elder guardians – one at the top and one in each wing.
The monument is constructed entirely from variants of prismarine and lit by sea lanterns. It includes a large central section flanked by two wings. Under the monument are 23 giant pillars that stretch to the ocean floor. The main entrance is located at the front of the central section. The base size of the structure is 58×58 blocks. Thus, the ocean monument (the location where guardians and elder guardians spawn) area is 3,364 square blocks.
The central section consists of various types of chambers. The chambers are randomly generated; each monument has a different number of rooms (at least six) arranged in a unique manner. The chambers connect vertically and horizontally to the different parts of the monument, including the left and right wings. At the topmost room resides an elder guardian. Around the center of the central section lies the treasure chamber, a tall room with eight gold blocks encased in dark prismarine.
Occasionally, monuments contain one or more rooms with approximately 30 wet sponges on the ceiling. Sponge rooms have an opening only in the floor. Not all monuments generate sponge rooms.
One of the wings contains a large room with a small pillar at the center. The room contains a second elder guardian. The other wing consists of a large open space with a large, square-shaped platform, containing another elder guardian. A long hallway that arcs around the wings and the back portion of the monument connects the two wings together.
|Icon||Achievement||In-game description||Actual requirements (if different)||Gamerscore earned||Trophy type (PS4)|
|The Deep End||Defeat an Elder Guardian||—||30G||Silver|
|Treasure Hunter||Acquire a map from a cartographer villager, then enter the revealed structure||Visit the structure indicated while the purchased map is in your main hand (hotbar).||40G||Silver|
|1.8||14w25a||Added ocean monuments.|
|1.8.2||pre7||Ocean monuments now generate correctly in Customized worlds.|
|1.9||15w46a||Ocean monuments now require a larger area of deep ocean at the center to generate.|
|1.11||16w39a||Added Ocean explorer maps, which guide players to ocean monuments.|
|Pocket Edition Alpha|
|v0.16.0||build 1||Added ocean monuments.|
|1.1.0||alpha 126.96.36.199||Added Ocean explorer maps, which guide players to ocean monuments.|
|1.4.0||beta 188.8.131.52||Ocean Monument now can generate in Frozen Deep Ocean, Lukewarm Deep Ocean, and Cold Deep Ocean, which previously generated only in normal Deep Ocean.|
|Legacy Console Edition|
|TU31||CU19||1.22||Patch 3||1.0.1||Added ocean monuments.|
|TU54||CU44||1.52||Patch 24||1.0.4||Improved spawn chances of ocean monuments.|
|New Nintendo 3DS Edition|
|1.3.12||Added ocean monuments.|
- Icebergs may generate on monuments, making elder guardians and guardians suffocate in icebergs.
- Ocean monuments, along with Nether fortresses, swamp huts and pillager outposts, are the only four generated structures in the game that have special spawning rules within their bounding boxes.
- "@WTheFranck Sure, but the ocean monument took me over two weeks to make... I need better tools :)" – @jeb_ on Twitter, June 19, 2014