diff --git a/main.lua b/main.lua
index 6040302..68bad43 100644
--- a/main.lua
+++ b/main.lua
@@ -15,7 +15,8 @@ local Systems = Concord.systems
 
 local Entity = Concord.entity
 
-local World = Concord.world
+local World  = Concord.world
+local Worlds = Concord.worlds
 
 Component("test_comp_1", function(e, x, y)
     e.x = x
@@ -58,12 +59,12 @@ function test_system:update2(dt) -- luacheck: ignore
 end
 
 
-local world = World()
+local world = World("testWorld")
 
 local entity = Entity()
 entity:give(Components.test_comp_1, 100, 100)
 
-world:addEntity(entity)
+Worlds.testWorld:addEntity(entity)
 
 world:addSystem(Systems.test_system, "update")
 world:addSystem(Systems.test_system, "update", "update2")
diff --git a/src/assemblage.lua b/src/assemblage.lua
index 79b3cbb..a6befed 100644
--- a/src/assemblage.lua
+++ b/src/assemblage.lua
@@ -1,14 +1,25 @@
 --- Assemblage
 
+local PATH = (...):gsub('%.[^%.]+$', '')
+
+local Assemblages = require(PATH..".world")
+
 local Assemblage = {}
 Assemblage.__index = Assemblage
 
-function Assemblage.new(assemble)
+function Assemblage.new(name, assemble)
+   if (type(name) ~= "string") then
+      error("bad argument #1 to 'Assemblage.new' (string expected, got "..type(name)..")", 2)
+   end
+
    local assemblage = setmetatable({
       __assemble = assemble,
 
+      __name         = name,
       __isAssemblage = true,
    }, Assemblage)
+   
+   Assemblages.register(name, assemblage)
 
    return assemblage
 end
diff --git a/src/assemblages.lua b/src/assemblages.lua
new file mode 100644
index 0000000..f86f629
--- /dev/null
+++ b/src/assemblages.lua
@@ -0,0 +1,29 @@
+-- Assemblages
+
+local PATH = (...):gsub('%.[^%.]+$', '')
+
+local Type = require(PATH..".type")
+
+local Assemblages = {}
+
+function Assemblages.register(name, assemblage)
+    if (type(name) ~= "string") then
+        error("bad argument #1 to 'Assemblages.register' (string expected, got "..type(name)..")", 3)
+    end
+
+    if (not Type.isAssemblage(assemblage)) then
+        error("bad argument #2 to 'Assemblages.register' (assemblage expected, got "..type(world)..")", 3)
+    end
+
+    if (rawget(Assemblages, name)) then
+        error("bad argument #2 to 'Assemblages.register' (Assemblage with name '"..name.."' is already registerd)", 3)
+    end
+
+    Assemblages[name] = assemblage
+end
+
+return setmetatable(Assemblages, {
+    __index = function(_, name)
+        error("Attempt to index assemblage '"..tostring(name).."' that does not exist / was not registered", 2)
+    end
+})
\ No newline at end of file
diff --git a/src/init.lua b/src/init.lua
index 4eb9b99..5f32550 100644
--- a/src/init.lua
+++ b/src/init.lua
@@ -32,11 +32,17 @@ local Concord = {
 }
 
 Concord.entity     = require(PATH..".entity")
+
 Concord.component  = require(PATH..".component")
 Concord.components = require(PATH..".components")
+
 Concord.system     = require(PATH..".system")
 Concord.systems    = require(PATH..".systems")
+
 Concord.world      = require(PATH..".world")
-Concord.assemblage = require(PATH..".assemblage")
+Concord.worlds     = require(PATH..".worlds")
+
+Concord.assemblage  = require(PATH..".assemblage")
+Concord.assemblages = require(PATH..".assemblages")
 
 return Concord
diff --git a/src/world.lua b/src/world.lua
index 86e76c3..217084e 100644
--- a/src/world.lua
+++ b/src/world.lua
@@ -2,7 +2,7 @@
 
 local PATH = (...):gsub('%.[^%.]+$', '')
 
-local Worlds = require(PATH..".world")
+local Worlds = require(PATH..".worlds")
 local Type   = require(PATH..".type")
 local List   = require(PATH..".list")
 
@@ -13,7 +13,7 @@ World.__index = World
 -- @return The new World
 function World.new(name)
    if (type(name) ~= "string") then
-      error("bad argument #1 to 'Component.new' (string expected, got "..type(name)..")", 2)
+      error("bad argument #1 to 'World.new' (string expected, got "..type(name)..")", 2)
    end
 
    local world = setmetatable({
@@ -31,7 +31,7 @@ function World.new(name)
       __isWorld = true,
    }, World)
 
-   Worlds.register(world)
+   Worlds.register(name, world)
 
    return world
 end
diff --git a/src/worlds.lua b/src/worlds.lua
index 0f8ad9c..2f8f5a8 100644
--- a/src/worlds.lua
+++ b/src/worlds.lua
@@ -19,7 +19,7 @@ function Worlds.register(name, world)
         error("bad argument #2 to 'Worlds.register' (World with name '"..name.."' is already registerd)", 3)
     end
 
-    Worlds[name] = component
+    Worlds[name] = world
 end
 
 return setmetatable(Worlds, {