diff --git a/docs/API class inheritance - blockentities.gv b/docs/API class inheritance - blockentities.gv
new file mode 100644
index 000000000..b913a9787
--- /dev/null
+++ b/docs/API class inheritance - blockentities.gv	
@@ -0,0 +1,15 @@
+digraph
+{
+rankdir=LR
+
+cBlockEntity -> cBlockEntityWithItems
+cBlockEntity -> cJukeboxEntity
+cBlockEntity -> cNoteEntity
+cBlockEntity -> cSignEntity
+cBlockEntityWithItems -> cChestEntity
+cBlockEntityWithItems -> cDropSpenserEntity
+cBlockEntityWithItems -> cFurnaceEntity
+cBlockEntityWithItems -> cHopperEntity
+cDropSpenserEntity -> cDropperEntity
+cDropSpenserEntity -> cDispenserEntity
+}
\ No newline at end of file
diff --git a/docs/API class inheritance - entities.gv b/docs/API class inheritance - entities.gv
new file mode 100644
index 000000000..aff9e80c9
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+++ b/docs/API class inheritance - entities.gv	
@@ -0,0 +1,43 @@
+digraph
+{
+rankdir=LR
+
+# Entities:
+cEntity -> cFallingBlock
+cEntity -> cMinecart
+cEntity -> cPawn
+cEntity -> cPickup
+cEntity -> cTNT
+cMinecart -> cEmptyMinecart
+cMinecart -> cMinecartWithChest
+cMinecart -> cMinecartWithFurnace
+
+# Mobs:
+cPawn -> cMonster
+cMonster -> cAggressiveMonster
+cMonster -> cPassiveMonster
+cAggressiveMonster -> cPassiveAggressiveMonster
+cPassiveMonster -> cBat
+cAggressiveMonster -> cBlaze
+cAggressiveMonster -> cCaveSpider
+cPassiveMonster -> cChicken
+cPassiveMonster -> cCow
+cAggressiveMonster -> cCreeper
+cPassiveAggressiveMonster -> cEnderman
+cAggressiveMonster -> cGhast
+cAggressiveMonster -> cMagmaCube
+cPassiveMonster -> cMooshroom
+cPassiveMonster -> cOcelot
+cPassiveMonster -> cPig
+cPassiveMonster -> cSheep
+cAggressiveMonster -> cSilverfish
+cAggressiveMonster -> cSkeleton
+cAggressiveMonster -> cSlime
+cAggressiveMonster -> cSpider
+cPassiveMonster -> cSquid
+cPassiveMonster -> cVillager
+cAggressiveMonster -> cWitch
+cPassiveAggressiveMonster -> cWolf
+cAggressiveMonster -> cZombie
+cPassiveAggressiveMonster -> cZombiePigman
+}
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diff --git a/docs/Object ownership.gv b/docs/Object ownership.gv
new file mode 100644
index 000000000..007432154
--- /dev/null
+++ b/docs/Object ownership.gv	
@@ -0,0 +1,29 @@
+digraph
+{
+rankdir=LR
+Root -> Server
+Root -> MonsterConfig
+Root -> GroupManager
+Root -> CraftingRecipes
+Root -> FurnaceRecipe
+Root -> PluginManager
+Root -> Authenticator
+Root -> World
+Server -> ListenThreadIPv4
+Server -> ListenThreadIPv6
+Server -> ClientHandle
+Server -> RCONServer
+PluginManager -> Plugin_NewLua
+PluginManager -> Plugin
+World -> SimulatorManager
+World -> SandSimulator
+World -> WaterSimulator
+World -> LavaSimulator
+World -> FireSimulator
+World -> RedstoneSimulator
+World -> WorldStorage
+World -> Player
+World -> Generator
+World -> ChunkSender
+World -> LightingThread
+}
\ No newline at end of file
diff --git a/docs/Springs.ods b/docs/Springs.ods
new file mode 100644
index 000000000..4b3559f1d
Binary files /dev/null and b/docs/Springs.ods differ
diff --git a/docs/_files.txt b/docs/_files.txt
new file mode 100644
index 000000000..31e5de926
--- /dev/null
+++ b/docs/_files.txt
@@ -0,0 +1,7 @@
+
+Contents of this folder:
+
+API class inheritance - blockentities.gv - a GraphViz file to visualise inheritance in the API classes in the Wiki for the cBlockEntity class' descendants
+API class inheritance - entities.gv - a GraphViz file to visualise inheritance in the API classes in the Wiki for the cEntity class' descendants
+Object ownership.gv - a GraphViz file to visualise ownership relations in the MCServer code architecture
+Springs.ods - a spreadsheet with collected statistics about the occurrence of lava / water springs based on height.