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Nether Fortress

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"Fortress" redirects here. For other uses, see Fortress (disambiguation).
Nether Fortress
Biomes Any Nether biome
Mobs πŸ‘ Image
Blaze

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Magma Cube

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Skeleton

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Wither Skeleton

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Zombified Piglin

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Chicken
(rarely through jockeys)β€Œ[Java Edition only]
Consists of
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 "title": "Nether Fortress",
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 "label": "(link to Biome article, displayed as Biomes)"
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 "field": "(values exceeds 1000 characters...)",
 "label": "(link to Mob article, displayed as Mobs)"
 },
 {
 "field": "\n*See (link to #Structure article, displayed as <span style=\"white-space: nowrap;\">Β§ Structure</span>)\n*See (link to #Blocks article, displayed as <span style=\"white-space: nowrap;\">Β§ Blocks</span>)",
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 "images": [
 "Nether Fortress.png"
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There is a related tutorial page for this topic!
 

A Nether fortress is an uncommon large structure made of Nether bricks found in the Nether, consisting of bridges, corridors, and towers. Nether fortresses are the only place where wither skeletons and blazes spawn. They also contain Nether wart.

Generation

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Nether fortresses generate in all Nether biomes. To do so, the game splits the Nether into regions in which one of either a fortress or a bastion remnant can generate. The regions are 432Γ—432 blocks in Java Edition and 480Γ—480 blocks in Bedrock Edition.

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The Nether structure generation in Java Edition. The black lines represent each region and the dots represent coordinates. The green color is where they can generate and red is where they cannot.

Each region has a four chunk separation located on the south and east borders of the region in which neither a fortress nor a bastion can generate.

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The Nether structure generation in Bedrock Edition. The black lines represent each region and the dots represent coordinates. The green color is where they can generate and red is where they cannot.

This leaves only a 368Γ—368 block section in Java Edition or 416Γ—416 block section in Bedrock Edition where a structure can generate.

Two structures never generate in the same region, although they might overlap if they generate close to the separation border. The chance of a fortress attempting to generate instead of a bastion is 2⁄5 (40%) in Java Edition and 1⁄3 (33.3%) in Bedrock Edition. However, if a bastion attempts to generate in the basalt deltas, a fortress generates instead, resulting in fortresses being the most common in the basalt deltas.

Nether fortresses can generate buried in netherrack. In such a case, the interior is not filled with netherrack; all hallways and passages are clear except for open walkways and bridges. It is possible but rare for glowstone or crimson and warped huge fungi to generate inside the fortress pathways.

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Structure

[edit | edit source]
Main article: /Structure

Nether fortresses are large complexes composed of Nether bricks supported by pillars that tower high above the lava seas.

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Segments of a Nether fortress that are fully enclosed.

The fortress generation starts with a plain four-way crossing centered at chunk coordinates 11, ~, 11 of the designated chunk.

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A crossroad found where walkways intersect.

A fortress has two areas, an exterior area of open bridges and an interior area of enclosed corridors. Both the bridges and corridors can end in an unfinished passageway structure or may simply end without elaboration. Fortresses can tunnel through netherrack, giving the "exterior" areas an appearance of tunnels with Nether brick floor and netherrack walls and ceilings. At broken sections the terrain is not cleared, which may create a tunnel that leads straight into a wall of netherrack.

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The general pattern of the walkways.
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A lava well found inside a Nether fortress.

The exterior consists of:

  • Straight bridges.
  • Up to five plain four-way crossings.
  • Up to four four-way crossings with arches made of Nether brick and Nether brick fences.
  • Up to four small rooms with a single entrance and full-block "stairs" leading to the roof, which may have a single path leading out.
  • Up to 2 blaze monster spawner platforms: structures consisting of three full-block "stairs" leading to a small platform fenced with Nether brick fence, with a blaze monster spawner in the center.
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Stairs in a Nether fortress, with Nether wart growing next to them.

The interior of the structures have 1Γ—2 windows with Nether brick fences as the windowpanes. The fences also form gate-like structures at the entrances of some rooms and corridors. Rooms include:

  • The lava well room, which is the connection between the interior and exterior areas.
  • Straight corridors.
  • Up to five four-way crossings.
  • Up to 20 corridor turns (10 right-turns and 10 left-turns), each with a 1⁄3 chance of having a loot chest in the corner.
  • Up to three stairways made from actual stair blocks, leading downward.
  • Up to two three-way intersections with a small exterior balcony.
  • Up to two stairways leading up to a garden of soul sand and Nether wart at the base of the stairs, a corridor leading away from the upper landing and a corridor behind the stairs. If the room is generated embedded in netherrack, only one block above the landing is cleared, with a further indent finishing above the stairs.
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An outline of the "bounding boxes".

Blocks

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Block
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Nether Bricks
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Nether Brick Fence
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Nether Brick Stairs
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Soul Sand
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Nether Wart
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Chest
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Blaze Monster Spawner
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Lava

Bounding boxes

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The structure bounding box for the 4-way intersection is pictured above (top-down view), and consists of a 19Γ—11Γ—19 volume centered on the floor block in the center of the intersection. This contrasts many of the other structure bounding boxes as their outlines tend to tightly follow the physical bounds of the structure. Notably, this also means that the fortress supports, which generate outside of that volume and go down to the ground and often into the lava ocean, are not considered part of the fortress for spawning purposes.

The area bounding box is a rectangular box that covers the entire fortress (again, excluding the supports). This is simply the smallest rectangular bounding box that can hold the bounding boxes of all structure pieces in the fortress.

Fortresses use a list of possible mobs to spawn that is separate from the rest of the Nether, regardless of the biome the fortress generates in. This includes zombified piglins, skeletons, and magma cubes, as well as two exclusive mobs not found anywhere else: blazes and wither skeletons.

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A blaze monster spawner generated in the Nether fortress.

Mobs spawn at a much higher rate if the fortress is surrounded by soul sand valley or warped forest biomes, as hostile mobs in these biomes spawn much less frequently, allowing more hostile mobs to spawn in the fortressβ€Œ[JE only][1].

Java Edition

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In Java Edition, the spawning algorithm has two checks:

  1. It checks if the spawn coordinates are within the "bounding box" of a single piece (e.g. corridor or walkway) of the fortress. (referred as "structure bounding box" above) In this case the block type of the ground does not matter.
  2. It checks if the spawn coordinates are within the "bounding box" (referred as "area bounding box" above) of the entire fortress and whether the ground consists of Nether bricks (not Nether brick slabs).

If either check passes, it uses the special mob list for fortresses rather than the list for the biome when choosing the mob to spawn. The actual mob spawning proceeds as normal for the mob chosen from this list.

In Java Edition
MobSpawn weightGroup size
Monster category
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Blaze
10⁄282–3
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Wither Skeleton
8⁄285
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Zombified Piglin
5⁄284
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Magma Cube
3⁄284
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Skeleton
2⁄285
{ "notes": [], "1": { "totalWeight": 28, "mobs": [ { "size": "2-3", "mob": "Blaze", "weight": 10 }, { "size": "5", "mob": "Wither Skeleton", "weight": 8 }, { "size": "4", "mob": "Zombified Piglin", "weight": 5 }, { "size": "4", "mob": "Magma Cube", "weight": 3 }, { "size": "5", "mob": "Skeleton", "weight": 2 } ], "category": "monster" } }

Bedrock Edition

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In Bedrock Edition, instead of spawning anywhere within a structural bounding box, most mobs spawn only in structure spawn locations along varied-length lines spaced apart 4-11 blocks throughout the fortress. They are not set to a particular Y level other than "inside the structure" and are indeed columns several blocks high. They do not require any special type of block, any regular spawnable block suffices.

To identify these spawning columns, glass panes or iron bars can be placed all over the fortress, 1 block above surface blocks. This keeps the mobs stationary. (This technique works in Bedrock because structure spawns occur in the northwest corner of blocks.) Note that these spots may be on top of the raised side blocks, so these side blocks have to be removed before a glass pane grid can be placed.

In Bedrock Edition
MobSpawn weightGroup size
Monster category
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Blaze
101–2
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Wither Skeleton
82–3
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Zombified Piglin
51
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Magma Cube
32–3
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Skeleton
22–3
{ "notes": [], "1": { "totalWeight": 28, "mobs": [ { "size": "1-2", "mob": "Blaze", "weight": 10 }, { "size": "2-3", "mob": "Wither Skeleton", "weight": 8 }, { "size": "1", "mob": "Zombified Piglin", "weight": 5 }, { "size": "2-3", "mob": "Magma Cube", "weight": 3 }, { "size": "2-3", "mob": "Skeleton", "weight": 2 } ], "category": "monster" } }
See also: Chest loot
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A chest that generated in a Nether fortress.

Fortresses generate Nether fortress loot with chests in the indoor sections placed at some corridor turns.

In Java Edition and Bedrock Edition, each nether fortress chest contains items drawn from 2 pools, with the following distribution:

Item Stack Size [A] Weight [B] Chance [C] Avg.
per chest
[D]
Avg. # chests
to search
[E]
2–4Γ— 1Γ— 2–4Γ— 1Γ—
πŸ‘ BlockSprite air.png: Sprite image for air in Minecraft
Nothing[F]
β€”1β€”14⁄1593.3%0.9331.1
πŸ‘ Image
Gold Ingot
1–3β€”15⁄78β€”46.5%1.1542.2
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Saddle
1β€”10⁄78β€”33.3%0.3853.0
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Golden Horse Armor
1β€”8⁄78β€”27.4%0.3083.6
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Nether Wart
3–7β€”5⁄78β€”17.9%0.9625.6
πŸ‘ Image
Iron Ingot
1–5β€”5⁄78β€”17.9%0.5775.6
πŸ‘ Image
Diamond
1–3β€”5⁄78β€”17.9%0.3855.6
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Copper Horse Armor
1β€”5⁄78β€”17.9%0.1925.6
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Flint and Steel
1β€”5⁄78β€”17.9%0.1925.6
πŸ‘ Image
Iron Horse Armor
1β€”5⁄78β€”17.9%0.1925.6
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Golden Sword
1β€”5⁄78β€”17.9%0.1925.6
πŸ‘ Image
Golden Chestplate
1β€”5⁄78β€”17.9%0.1925.6
πŸ‘ Image
Diamond Horse Armor
1β€”3⁄78β€”11.1%0.1159.0
πŸ‘ Image
Obsidian
2–4β€”2⁄78β€”7.5%0.23113.4
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Rib Armor Trim Smithing Template
β€”1β€”1⁄156.7%0.06715.0
{ "chestNames": [ "nether-fortress" ], "gameVersion": "Java", "loot": { "nether-fortress": { "poolsJava": [ { "items": { "diamond": [ 1, 3, 5 ], "saddle": [ 1, 1, 10 ], "obsidian": [ 2, 4, 2 ], "gold-ingot": [ 1, 3, 15 ], "diamond-horse-armor": [ 1, 1, 3 ], "copper-horse-armor": [ 1, 1, 5 ], "golden-chestplate": [ 1, 1, 5 ], "iron-horse-armor": [ 1, 1, 5 ], "golden-horse-armor": [ 1, 1, 8 ], "golden-sword": [ 1, 1, 5 ], "iron-ingot": [ 1, 5, 5 ], "flint-and-steel": [ 1, 1, 5 ], "nether-wart": [ 3, 7, 5 ] }, "rolls": [ 2, 4 ], "totalweight": 78 }, { "items": { "empty": [ 1, 1, 14 ], "rib-armor-trim-smithing-template": [ 1, 1, 1 ] }, "rolls": [ 1, 1 ], "totalweight": 15 } ], "poolsBedrockUpcoming": [], "itemDataJava": { "diamond": { "itemname": "diamond", "sizes": [ "1–3", "β€”" ], "sortsize": [ 2, 0 ], "sortweight": [ 5, 0 ], "weights": [ "<sup>5</sup>&frasl;<sub>78</sub>", "β€”" ], "avgamount": 0.38461538461538464, "chanceany": 0.17904394543308721 }, "diamond-horse-armor": { "itemname": "diamond-horse-armor", "sizes": [ 1, "β€”" ], "sortsize": [ 1, 0 ], "sortweight": [ 3, 0 ], "weights": [ "<sup>3</sup>&frasl;<sub>78</sub>", "β€”" ], "avgamount": 0.11538461538461539, "chanceany": 0.11054774576053594 }, "rib-armor-trim-smithing-template": { "itemname": "rib-armor-trim-smithing-template", "sizes": [ "β€”", 1 ], "sortsize": [ 0, 1 ], "sortweight": [ 0, 1 ], "weights": [ "β€”", "<sup>1</sup>&frasl;<sub>15</sub>" ], "avgamount": 0.06666666666666667, "chanceany": 0.06666666666666665 }, "empty": { "itemname": "empty", "sizes": [ "β€”", 1 ], "sortsize": [ 0, 1 ], "sortweight": [ 0, 14 ], "weights": [ "β€”", "<sup>14</sup>&frasl;<sub>15</sub>" ], "avgamount": 0.9333333333333333, "chanceany": 0.9333333333333333 }, "obsidian": { "itemname": "obsidian", "sizes": [ "2–4", "β€”" ], "sortsize": [ 3, 0 ], "sortweight": [ 2, 0 ], "weights": [ "<sup>2</sup>&frasl;<sub>78</sub>", "β€”" ], "avgamount": 0.23076923076923078, "chanceany": 0.07475948885952421 }, "gold-ingot": { "itemname": "gold-ingot", "sizes": [ "1–3", "β€”" ], "sortsize": [ 2, 0 ], "sortweight": [ 15, 0 ], "weights": [ "<sup>15</sup>&frasl;<sub>78</sub>", "β€”" ], "avgamount": 1.1538461538461537, "chanceany": 0.4650463044011064 }, "copper-horse-armor": { "sortsize": [ 1, 0 ], "weights": [ "<sup>5</sup>&frasl;<sub>78</sub>", "β€”" ], "chanceany": 0.17904394543308721, "sizes": [ 1, "β€”" ], "sortweight": [ 5, 0 ], "armor": 0, "material": 0, "avgamount": 0.19230769230769232, "itemname": "copper-horse-armor" }, "saddle": { "sortsize": [ 1, 0 ], "weights": [ "<sup>10</sup>&frasl;<sub>78</sub>", "β€”" ], "chanceany": 0.33324889922270184, "sizes": [ 1, "β€”" ], "sortweight": [ 10, 0 ], "armor": 0, "material": 0, "avgamount": 0.38461538461538464, "itemname": "saddle" }, "golden-chestplate": { "sortsize": [ 1, 0 ], "weights": [ "<sup>5</sup>&frasl;<sub>78</sub>", "β€”" ], "chanceany": 0.17904394543308721, "sizes": [ 1, "β€”" ], "sortweight": [ 5, 0 ], "armor": 2, "material": 3, "avgamount": 0.19230769230769232, "itemname": "golden-chestplate" }, "iron-horse-armor": { "sortsize": [ 1, 0 ], "weights": [ "<sup>5</sup>&frasl;<sub>78</sub>", "β€”" ], "chanceany": 0.17904394543308721, "sizes": [ 1, "β€”" ], "sortweight": [ 5, 0 ], "armor": 0, "material": 2, "avgamount": 0.19230769230769232, "itemname": "iron-horse-armor" }, "iron-ingot": { "itemname": "iron-ingot", "sizes": [ "1–5", "β€”" ], "sortsize": [ 3, 0 ], "sortweight": [ 5, 0 ], "weights": [ "<sup>5</sup>&frasl;<sub>78</sub>", "β€”" ], "avgamount": 0.5769230769230769, "chanceany": 0.17904394543308721 }, "golden-sword": { "sortsize": [ 1, 0 ], "weights": [ "<sup>5</sup>&frasl;<sub>78</sub>", "β€”" ], "chanceany": 0.17904394543308721, "sizes": [ 1, "β€”" ], "sortweight": [ 5, 0 ], "armor": 0, "material": 3, "avgamount": 0.19230769230769232, "itemname": "golden-sword" }, "golden-horse-armor": { "itemname": "golden-horse-armor", "sizes": [ 1, "β€”" ], "sortsize": [ 1, 0 ], "sortweight": [ 8, 0 ], "weights": [ "<sup>8</sup>&frasl;<sub>78</sub>", "β€”" ], "avgamount": 0.3076923076923077, "chanceany": 0.2743889585542344 }, "flint-and-steel": { "sortsize": [ 1, 0 ], "weights": [ "<sup>5</sup>&frasl;<sub>78</sub>", "β€”" ], "chanceany": 0.17904394543308721, "sizes": [ 1, "β€”" ], "sortweight": [ 5, 0 ], "armor": 0, "material": 0, "avgamount": 0.19230769230769232, "itemname": "flint-and-steel" }, "nether-wart": { "itemname": "nether-wart", "sizes": [ "3–7", "β€”" ], "sortsize": [ 5, 0 ], "sortweight": [ 5, 0 ], "weights": [ "<sup>5</sup>&frasl;<sub>78</sub>", "β€”" ], "avgamount": 0.9615384615384616, "chanceany": 0.17904394543308721 } }, "display_name": "nether fortress", "structID": "nether-fortress", "poolsJavaUpcoming": [], "structure": "Nether Fortress", "container": "", "itemDataJavaUpcoming": [], "allRollsJavaUpcoming": [], "itemDataBedrock": { "diamond": { "itemname": "diamond", "sizes": [ "1–3", "β€”" ], "sortsize": [ 2, 0 ], "sortweight": [ 5, 0 ], "weights": [ "<sup>5</sup>&frasl;<sub>78</sub>", "β€”" ], "avgamount": 0.38461538461538464, "chanceany": 0.17904394543308721 }, "diamond-horse-armor": { "itemname": "diamond-horse-armor", "sizes": [ 1, "β€”" ], "sortsize": [ 1, 0 ], "sortweight": [ 3, 0 ], "weights": [ "<sup>3</sup>&frasl;<sub>78</sub>", "β€”" ], "avgamount": 0.11538461538461539, "chanceany": 0.11054774576053594 }, "rib-armor-trim-smithing-template": { "itemname": "rib-armor-trim-smithing-template", "sizes": [ "β€”", 1 ], "sortsize": [ 0, 1 ], "sortweight": [ 0, 1 ], "weights": [ "β€”", "<sup>1</sup>&frasl;<sub>15</sub>" ], "avgamount": 0.06666666666666667, "chanceany": 0.06666666666666665 }, "empty": { "itemname": "empty", "sizes": [ "β€”", 1 ], "sortsize": [ 0, 1 ], "sortweight": [ 0, 14 ], "weights": [ "β€”", "<sup>14</sup>&frasl;<sub>15</sub>" ], "avgamount": 0.9333333333333333, "chanceany": 0.9333333333333333 }, "obsidian": { "itemname": "obsidian", "sizes": [ "2–4", "β€”" ], "sortsize": [ 3, 0 ], "sortweight": [ 2, 0 ], "weights": [ "<sup>2</sup>&frasl;<sub>78</sub>", "β€”" ], "avgamount": 0.23076923076923078, "chanceany": 0.07475948885952421 }, "gold-ingot": { "itemname": "gold-ingot", "sizes": [ "1–3", "β€”" ], "sortsize": [ 2, 0 ], "sortweight": [ 15, 0 ], "weights": [ "<sup>15</sup>&frasl;<sub>78</sub>", "β€”" ], "avgamount": 1.1538461538461537, "chanceany": 0.4650463044011064 }, "copper-horse-armor": { "sortsize": [ 1, 0 ], "weights": [ "<sup>5</sup>&frasl;<sub>78</sub>", "β€”" ], "chanceany": 0.17904394543308721, "sizes": [ 1, "β€”" ], "sortweight": [ 5, 0 ], "armor": 0, "material": 0, "avgamount": 0.19230769230769232, "itemname": "copper-horse-armor" }, "saddle": { "sortsize": [ 1, 0 ], "weights": [ "<sup>10</sup>&frasl;<sub>78</sub>", "β€”" ], "chanceany": 0.33324889922270184, "sizes": [ 1, "β€”" ], "sortweight": [ 10, 0 ], "armor": 0, "material": 0, "avgamount": 0.38461538461538464, "itemname": "saddle" }, "golden-chestplate": { "sortsize": [ 1, 0 ], "weights": [ "<sup>5</sup>&frasl;<sub>78</sub>", "β€”" ], "chanceany": 0.17904394543308721, "sizes": [ 1, "β€”" ], "sortweight": [ 5, 0 ], "armor": 2, "material": 3, "avgamount": 0.19230769230769232, "itemname": "golden-chestplate" }, "iron-horse-armor": { "sortsize": [ 1, 0 ], "weights": [ "<sup>5</sup>&frasl;<sub>78</sub>", "β€”" ], "chanceany": 0.17904394543308721, "sizes": [ 1, "β€”" ], "sortweight": [ 5, 0 ], "armor": 0, "material": 2, "avgamount": 0.19230769230769232, "itemname": "iron-horse-armor" }, "iron-ingot": { "itemname": "iron-ingot", "sizes": [ "1–5", "β€”" ], "sortsize": [ 3, 0 ], "sortweight": [ 5, 0 ], "weights": [ "<sup>5</sup>&frasl;<sub>78</sub>", "β€”" ], "avgamount": 0.5769230769230769, "chanceany": 0.17904394543308721 }, "golden-sword": { "sortsize": [ 1, 0 ], "weights": [ "<sup>5</sup>&frasl;<sub>78</sub>", "β€”" ], "chanceany": 0.17904394543308721, "sizes": [ 1, "β€”" ], "sortweight": [ 5, 0 ], "armor": 0, "material": 3, "avgamount": 0.19230769230769232, "itemname": "golden-sword" }, "golden-horse-armor": { "itemname": "golden-horse-armor", "sizes": [ 1, "β€”" ], "sortsize": [ 1, 0 ], "sortweight": [ 8, 0 ], "weights": [ "<sup>8</sup>&frasl;<sub>78</sub>", "β€”" ], "avgamount": 0.3076923076923077, "chanceany": 0.2743889585542344 }, "flint-and-steel": { "sortsize": [ 1, 0 ], "weights": [ "<sup>5</sup>&frasl;<sub>78</sub>", "β€”" ], "chanceany": 0.17904394543308721, "sizes": [ 1, "β€”" ], "sortweight": [ 5, 0 ], "armor": 0, "material": 0, "avgamount": 0.19230769230769232, "itemname": "flint-and-steel" }, "nether-wart": { "itemname": "nether-wart", "sizes": [ "3–7", "β€”" ], "sortsize": [ 5, 0 ], "sortweight": [ 5, 0 ], "weights": [ "<sup>5</sup>&frasl;<sub>78</sub>", "β€”" ], "avgamount": 0.9615384615384616, "chanceany": 0.17904394543308721 } }, "poolsBedrock": [ { "items": { "diamond": [ 1, 3, 5 ], "saddle": [ 1, 1, 10 ], "obsidian": [ 2, 4, 2 ], "gold-ingot": [ 1, 3, 15 ], "diamond-horse-armor": [ 1, 1, 3 ], "copper-horse-armor": [ 1, 1, 5 ], "golden-chestplate": [ 1, 1, 5 ], "iron-horse-armor": [ 1, 1, 5 ], "golden-horse-armor": [ 1, 1, 8 ], "golden-sword": [ 1, 1, 5 ], "iron-ingot": [ 1, 5, 5 ], "flint-and-steel": [ 1, 1, 5 ], "nether-wart": [ 3, 7, 5 ] }, "rolls": [ 2, 4 ], "totalweight": 78 }, { "items": { "empty": [ 1, 1, 14 ], "rib-armor-trim-smithing-template": [ 1, 1, 1 ] }, "rolls": [ 1, 1 ], "totalweight": 15 } ], "allRollsBedrockUpcoming": [], "allRollsBedrock": [ "2–4", 1 ], "itemDataBedrockUpcoming": [], "header": "[[Nether Fortress]]", "allRollsJava": [ "2–4", 1 ], "link": "[[nether fortress]]" } } }
  1. ↑ The size of stacks (or for unstackable items, number) of this item on any given roll.
  2. ↑ The weight of this item relative to other items in the pool.
  3. ↑ The odds of finding any of this item in a single chest.
  4. ↑ The number of items expected per chest, averaged over a large number of chests.
  5. ↑ The average number of chests the player should expect to search to find any of this item.
  6. ↑ 'Nothing' does not refer to the chance of an empty chest. Instead, it refers to the chance that the random loot generator does not add any loot on a single roll.

Data values

[edit | edit source]

Java Edition:

Structure typeIdentifier
πŸ‘ EnvSprite nether-fortress.png: Sprite image for nether-fortress in Minecraft
Nether Fortress
fortress
StructureIdentifier
πŸ‘ EnvSprite nether-fortress.png: Sprite image for nether-fortress in Minecraft
Nether Fortress
fortress

Bedrock Edition:

StructureIdentifier Translation key
πŸ‘ EnvSprite nether-fortress.png: Sprite image for nether-fortress in Minecraft
Nether Fortress
fortress feature.fortress

Config

[edit | edit source]

Java Edition:

Advancements

[edit | edit source]
IconAdvancementIn-game descriptionActual requirements (if different)
πŸ‘ Image
πŸ‘ Image
A Terrible FortressBreak your way into a Nether FortressEnter a nether fortress.

Videos

[edit | edit source]

History

[edit | edit source]

Teaser

[edit | edit source]
September 16, 2011Jeb tweets a teaser screenshot of changes to the Nether terrain generation, including fortresses.
September 19, 2011Jeb releases a second teaser screenshot, showcasing the structure of the then upcoming fortresses.
September 21, 2011Jeb mentions that he is finished with most of the new Nether features, including two new mobs, one of which is a "retexturing attempt".

Java Edition

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Java Edition
1.0.0Beta 1.9 PrereleaseAdded Nether fortresses.
1.4.212w36aWither skeletons and skeletons now naturally spawn in fortresses.
As a result, other mobs also found in fortresses spawn less often. Zombie pigmen's spawning weight is halved, making them significantly less common.
1.6.113w18aChests now generate in fortresses.
1.814w27aFortresses are now affected by the "Generated structures" option.
14w30aAdded possibility of obsidian in chests.
1.915w43aReduced loot in chests from 2–5 stacks to 2–4 stacks.
1.1620w06aFortresses can now spawn in the soul sand valley biome.
20w15aFortresses can now spawn in the basalt deltas biome.
20w16aFortresses now generate evenly throughout the Nether.
Pre-release 3Fortresses are now slightly more common.
1.18.2Pre-release 1If a bastion remnant attempts to generate in a basalt delta, a fortress generates in its place, instead of being skipped entirely.
1.19.4
Experiment
Update 1.20
23w04aRib armor trim is now found in fortress chests.
23w05aIncreased the chance that rib armor trim is found in fortress chests from 4.7% to 6.7%.
1.21.925w31aCopper horse armor is now found in fortress chests.

Bedrock Edition

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Pocket Edition Alpha
v0.12.1build 1Added fortresses.
v0.15.0build 1Horse armor can now be found in chest loot.
Bedrock Edition
1.19.80
Experiment
Next Major Update
Preview 1.19.80.21Rib armor trim is now found in fortress chests.

Legacy Console Edition

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Legacy Console Edition
Xbox 360Xbox OnePS3PS4PS VitaWii USwitch
TU7CU11.001.001.00Patch 11.0.1Added fortresses.
TU9Changed fortresses to make Nether wart rooms more likely.
TU19CU71.121.121.12Wither skeletons and skeletons now naturally spawn in fortresses.
As a result, other mobs also found in fortresses spawn less often. Zombie pigmen's spawning weight is halved, making them significantly less common.[verify]
Chests now generate.
TU31CU191.221.221.22Patch 3Added possibility of obsidian in chests.

New Nintendo 3DS Edition

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New Nintendo 3DS Edition
0.1.0Added fortresses.

Issues

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Issues relating to "Nether Fortress" are maintained on the bug tracker. Issues should be reported and viewed there.

Trivia

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  • In rare cases, a fortress may not generate any indoor rooms except one single lava room[2]. This usually occurs when a portion of the exterior section of the fortress blocks the exit to the interior section of the lava well room.
  • Sometimes, two or more fortresses can generate close to or even within one another, creating an even larger cumulative fortress.
  • There is an opening out of the fortress under the lava well, with a single block of Nether bricks from which the lava spreads out.
  • The soul sand valley bone blocks and basalt pillars (down to within three blocks as-usual of a walkway) can replace more Nether bricks. Less-often, huge fungi, Nether wart blocks, warped wart blocks, crimson stems, and warped stems can replace Nether brick, most visibly along walls.
  • A fortress can be seen in the background in the Nether in A Minecraft Movie.[3]

Gallery

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Screenshots

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Mojang screenshots

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Historical screenshots

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In other media

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References

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Navigation

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