diff --git a/.idea/dictionaries/moritz.xml b/.idea/dictionaries/moritz.xml
index 46f54007e..5aa5b75b4 100644
--- a/.idea/dictionaries/moritz.xml
+++ b/.idea/dictionaries/moritz.xml
@@ -4,6 +4,7 @@
       <w>clientbound</w>
       <w>cooldown</w>
       <w>gamemode</w>
+      <w>jitpack</w>
       <w>minosoft</w>
       <w>mojang</w>
       <w>motd</w>
diff --git a/.idea/jarRepositories.xml b/.idea/jarRepositories.xml
index 712ab9d98..b00065041 100644
--- a/.idea/jarRepositories.xml
+++ b/.idea/jarRepositories.xml
@@ -1,6 +1,16 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <project version="4">
   <component name="RemoteRepositoriesConfiguration">
+    <remote-repository>
+      <option name="id" value="jitpack.io" />
+      <option name="name" value="jitpack.io" />
+      <option name="url" value="http://www.jitpack.io" />
+    </remote-repository>
+    <remote-repository>
+      <option name="id" value="jitpack.io" />
+      <option name="name" value="jitpack.io" />
+      <option name="url" value="https://www.jitpack.io" />
+    </remote-repository>
     <remote-repository>
       <option name="id" value="central" />
       <option name="name" value="Central Repository" />
@@ -11,6 +21,11 @@
       <option name="name" value="Maven Central repository" />
       <option name="url" value="https://repo1.maven.org/maven2" />
     </remote-repository>
+    <remote-repository>
+      <option name="id" value="jitpack.io" />
+      <option name="name" value="jitpack.io" />
+      <option name="url" value="https://jitpack.io" />
+    </remote-repository>
     <remote-repository>
       <option name="id" value="jboss.community" />
       <option name="name" value="JBoss Community repository" />
diff --git a/pom.xml b/pom.xml
index 3b5814651..63f3ef1de 100644
--- a/pom.xml
+++ b/pom.xml
@@ -1,4 +1,17 @@
 <?xml version="1.0" encoding="UTF-8"?>
+<!--
+  ~ Codename Minosoft
+  ~ Copyright (C) 2020 Moritz Zwerger
+  ~
+  ~ This program is free software: you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, either version 3 of the License, or (at your option) any later version.
+  ~
+  ~  This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.
+  ~
+  ~  You should have received a copy of the GNU General Public License along with this program.  If not, see <https://www.gnu.org/licenses/>.
+  ~
+  ~  This software is not affiliated with Mojang AB, the original developer of Minecraft.
+  -->
+
 <project xmlns="http://maven.apache.org/POM/4.0.0"
          xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
          xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
@@ -7,6 +20,12 @@
     <groupId>de.bixilon</groupId>
     <artifactId>Minosoft</artifactId>
     <version>0.1</version>
+    <repositories>
+        <repository>
+            <id>jitpack.io</id>
+            <url>http://www.jitpack.io</url>
+        </repository>
+    </repositories>
     <build>
         <plugins>
             <plugin>
@@ -37,6 +56,11 @@
             <artifactId>snakeyaml</artifactId>
             <version>1.25</version>
         </dependency>
+        <dependency>
+            <groupId>com.github.Querz</groupId>
+            <artifactId>NBT</artifactId>
+            <version>5.4</version>
+        </dependency>
     </dependencies>
 
 </project>
\ No newline at end of file
diff --git a/src/main/java/de/bixilon/minosoft/game/datatypes/World.java b/src/main/java/de/bixilon/minosoft/game/datatypes/World.java
index ebc4a3d0e..0e0e729d2 100644
--- a/src/main/java/de/bixilon/minosoft/game/datatypes/World.java
+++ b/src/main/java/de/bixilon/minosoft/game/datatypes/World.java
@@ -14,6 +14,7 @@
 package de.bixilon.minosoft.game.datatypes;
 
 import de.bixilon.minosoft.game.datatypes.blocks.Block;
+import de.bixilon.minosoft.game.datatypes.entities.Entity;
 
 import java.util.HashMap;
 import java.util.Map;
@@ -23,6 +24,7 @@ import java.util.Map;
  */
 public class World {
     public final HashMap<ChunkLocation, Chunk> chunks;
+    public final HashMap<Integer, Entity> entities;
     final String name;
     boolean hardcore;
     boolean raining;
@@ -30,6 +32,7 @@ public class World {
     public World(String name) {
         this.name = name;
         chunks = new HashMap<>();
+        entities = new HashMap<>();
     }
 
     public String getName() {
diff --git a/src/main/java/de/bixilon/minosoft/game/datatypes/entities/Entities.java b/src/main/java/de/bixilon/minosoft/game/datatypes/entities/Entities.java
new file mode 100644
index 000000000..df3b2fda1
--- /dev/null
+++ b/src/main/java/de/bixilon/minosoft/game/datatypes/entities/Entities.java
@@ -0,0 +1,60 @@
+/*
+ * Codename Minosoft
+ * Copyright (C) 2020 Moritz Zwerger
+ *
+ * This program is free software: you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, either version 3 of the License, or (at your option) any later version.
+ *
+ *  This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.
+ *
+ *  You should have received a copy of the GNU General Public License along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ *
+ *  This software is not affiliated with Mojang AB, the original developer of Minecraft.
+ */
+
+package de.bixilon.minosoft.game.datatypes.entities;
+
+import de.bixilon.minosoft.game.datatypes.Identifier;
+
+public enum Entities {
+    ZOMBIE(new Identifier("zombie"), 54, Zombie.class);
+
+    final Identifier identifier;
+    final int type;
+    final Class<? extends Entity> clazz;
+
+    Entities(Identifier identifier, int type, Class<? extends Entity> clazz) {
+        this.identifier = identifier;
+        this.type = type;
+        this.clazz = clazz;
+    }
+
+    public static Entities byIdentifier(Identifier identifier) {
+        for (Entities b : values()) {
+            if (b.getIdentifier().equals(identifier)) {
+                return b;
+            }
+        }
+        return null;
+    }
+
+    public static Entities byType(int type) {
+        for (Entities b : values()) {
+            if (b.getType() == type) {
+                return b;
+            }
+        }
+        return null;
+    }
+
+    public Identifier getIdentifier() {
+        return identifier;
+    }
+
+    public int getType() {
+        return type;
+    }
+
+    public Class<? extends Entity> getClazz() {
+        return clazz;
+    }
+}
diff --git a/src/main/java/de/bixilon/minosoft/game/datatypes/entities/Entity.java b/src/main/java/de/bixilon/minosoft/game/datatypes/entities/Entity.java
new file mode 100644
index 000000000..6f193324c
--- /dev/null
+++ b/src/main/java/de/bixilon/minosoft/game/datatypes/entities/Entity.java
@@ -0,0 +1,46 @@
+/*
+ * Codename Minosoft
+ * Copyright (C) 2020 Moritz Zwerger
+ *
+ * This program is free software: you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, either version 3 of the License, or (at your option) any later version.
+ *
+ *  This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.
+ *
+ *  You should have received a copy of the GNU General Public License along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ *
+ *  This software is not affiliated with Mojang AB, the original developer of Minecraft.
+ */
+
+package de.bixilon.minosoft.game.datatypes.entities;
+
+public interface Entity {
+    Entities getEntityType();
+
+    int getId();
+
+    Location getLocation();
+
+    void setLocation(Location location);
+
+    Velocity getVelocity();
+
+    void setVelocity(Velocity velocity);
+
+    int getYaw();
+
+    void setYaw(int yaw);
+
+    int getPitch();
+
+    void setPitch(int pitch);
+
+    float getWidth();
+
+    float getHeight();
+
+    EntityMetaData getMetaData();
+
+    void setMetaData(EntityMetaData data);
+
+
+}
diff --git a/src/main/java/de/bixilon/minosoft/game/datatypes/entities/EntityMetaData.java b/src/main/java/de/bixilon/minosoft/game/datatypes/entities/EntityMetaData.java
new file mode 100644
index 000000000..8ba25cdff
--- /dev/null
+++ b/src/main/java/de/bixilon/minosoft/game/datatypes/entities/EntityMetaData.java
@@ -0,0 +1,39 @@
+/*
+ * Codename Minosoft
+ * Copyright (C) 2020 Moritz Zwerger
+ *
+ * This program is free software: you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, either version 3 of the License, or (at your option) any later version.
+ *
+ *  This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.
+ *
+ *  You should have received a copy of the GNU General Public License along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ *
+ *  This software is not affiliated with Mojang AB, the original developer of Minecraft.
+ */
+
+package de.bixilon.minosoft.game.datatypes.entities;
+
+import net.querz.nbt.io.NBTUtil;
+import net.querz.nbt.io.NamedTag;
+
+import java.io.IOException;
+
+public class EntityMetaData {
+    NamedTag nbt;
+
+    public EntityMetaData(byte[] nbt) {
+        try {
+            this.nbt = NBTUtil.read(new String(nbt));
+        } catch (IOException e) {
+            e.printStackTrace();
+        }
+    }
+
+    public EntityMetaData(String nbt) {
+        try {
+            this.nbt = NBTUtil.read(nbt);
+        } catch (IOException e) {
+            e.printStackTrace();
+        }
+    }
+}
diff --git a/src/main/java/de/bixilon/minosoft/game/datatypes/entities/Velocity.java b/src/main/java/de/bixilon/minosoft/game/datatypes/entities/Velocity.java
new file mode 100644
index 000000000..16750fc3c
--- /dev/null
+++ b/src/main/java/de/bixilon/minosoft/game/datatypes/entities/Velocity.java
@@ -0,0 +1,47 @@
+/*
+ * Codename Minosoft
+ * Copyright (C) 2020 Moritz Zwerger
+ *
+ * This program is free software: you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, either version 3 of the License, or (at your option) any later version.
+ *
+ *  This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.
+ *
+ *  You should have received a copy of the GNU General Public License along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ *
+ *  This software is not affiliated with Mojang AB, the original developer of Minecraft.
+ */
+
+package de.bixilon.minosoft.game.datatypes.entities;
+
+public class Velocity {
+    private final short x;
+    private final short y;
+    private final short z;
+
+    public Velocity(short x, short y, short z) {
+        this.x = x;
+        this.y = y;
+        this.z = z;
+    }
+
+    public short getX() {
+        return x;
+    }
+
+    public short getY() {
+        return y;
+    }
+
+    public short getZ() {
+        return z;
+    }
+
+    @Override
+    public boolean equals(Object obj) {
+        if (super.equals(obj)) {
+            return true;
+        }
+        Velocity that = (Velocity) obj;
+        return that.getX() == getX() && that.getY() == getY() && that.getZ() == getZ();
+    }
+}
diff --git a/src/main/java/de/bixilon/minosoft/game/datatypes/entities/Zombie.java b/src/main/java/de/bixilon/minosoft/game/datatypes/entities/Zombie.java
new file mode 100644
index 000000000..84a3e0f4c
--- /dev/null
+++ b/src/main/java/de/bixilon/minosoft/game/datatypes/entities/Zombie.java
@@ -0,0 +1,99 @@
+/*
+ * Codename Minosoft
+ * Copyright (C) 2020 Moritz Zwerger
+ *
+ * This program is free software: you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, either version 3 of the License, or (at your option) any later version.
+ *
+ *  This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.
+ *
+ *  You should have received a copy of the GNU General Public License along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ *
+ *  This software is not affiliated with Mojang AB, the original developer of Minecraft.
+ */
+
+package de.bixilon.minosoft.game.datatypes.entities;
+
+public class Zombie implements Entity {
+    final int id;
+    Location location;
+    Velocity velocity;
+    int yaw;
+    int pitch;
+    EntityMetaData data;
+
+    public Zombie(int id) {
+        this.id = id;
+    }
+
+    @Override
+    public Entities getEntityType() {
+        return Entities.ZOMBIE;
+    }
+
+    public int getId() {
+        return id;
+    }
+
+    @Override
+    public Location getLocation() {
+        return location;
+    }
+
+    @Override
+    public void setLocation(Location location) {
+        this.location = location;
+
+    }
+
+    @Override
+    public Velocity getVelocity() {
+        return velocity;
+    }
+
+    @Override
+    public void setVelocity(Velocity velocity) {
+        this.velocity = velocity;
+    }
+
+    @Override
+    public int getYaw() {
+        return 0;
+    }
+
+    @Override
+    public void setYaw(int yaw) {
+        this.yaw = yaw;
+
+    }
+
+    @Override
+    public int getPitch() {
+        return 0;
+    }
+
+    @Override
+    public void setPitch(int pitch) {
+        this.pitch = pitch;
+
+    }
+
+    @Override
+    public float getWidth() {
+        return 0;
+    }
+
+    @Override
+    public float getHeight() {
+        return 0;
+    }
+
+    @Override
+    public EntityMetaData getMetaData() {
+        return data;
+    }
+
+    @Override
+    public void setMetaData(EntityMetaData data) {
+        this.data = data;
+    }
+}