diff --git a/src/controller/AbstractController.php b/src/controller/AbstractController.php
index f2de7fe..57d9af5 100644
--- a/src/controller/AbstractController.php
+++ b/src/controller/AbstractController.php
@@ -27,7 +27,14 @@ abstract class AbstractController
     }
     
     protected function render(string $template,array $variables=[]):void{
-        echo $this->core->getTwig()->render($template,$variables);
+        echo $this->core->getTwig()->render($template,$this->addUser($variables));
+    }
+    
+    private function addUser(array $variables):array{
+        if(array_key_exists('user', $variables)){
+            throw new \Exception('Key user isn\'t allowed!');
+        }
+        $variables['user'] = $this->core->getUser();
+        return $variables;
     }
 }
-
diff --git a/src/controller/AbstractDefaultController.php b/src/controller/AbstractDefaultController.php
new file mode 100644
index 0000000..a1e5c2d
--- /dev/null
+++ b/src/controller/AbstractDefaultController.php
@@ -0,0 +1,67 @@
+<?php
+namespace controller;
+
+use router\link\Link;
+use router\Router;
+
+/**
+ * This controllers render the frames/default.html.twig
+ *
+ * @author kevinfrantz
+ *        
+ */
+class AbstractDefaultController extends AbstractController
+{
+
+    protected function render(string $template, array $variables = []): void
+    {
+        parent::render($template, $this->addMenuItems($variables));
+    }
+
+    private function addMenuItems(array $variables): array
+    {
+        if (array_key_exists('menu_items', $variables)) {
+            throw new \Exception('You aren\'t allowed to define this key!');
+        }
+        $variables['menu_items'] = $this->getMenuItems();
+        return $variables;
+    }
+
+    private function getMenuItems(): array
+    {
+        return array_merge([
+            new Link([], 'home'),
+            new Link([
+                Router::CONTROLLER => 'product',
+                Router::ACTION => 'list'
+            ], 'product list'),
+            new Link([
+                Router::CONTROLLER => 'order',
+                Router::ACTION => 'basket'
+            ], 'basket')
+        ], $this->getUserMenuItems());
+    }
+
+    private function getUserMenuItems(): array
+    {
+        if ($this->core->getUser()) {
+            return [
+                new Link([
+                    Router::CONTROLLER => 'user',
+                    Router::ACTION => 'logout'
+                ], 'logout')
+            ];
+        }
+        return [
+            new Link([
+                Router::CONTROLLER => 'user',
+                Router::ACTION => 'login'
+            ], 'login'),
+            new Link([
+                Router::CONTROLLER => 'user',
+                Router::ACTION => 'register'
+            ], 'register')
+        ];
+    }
+}
+
diff --git a/src/controller/product/Product.php b/src/controller/product/Product.php
index 7493c9f..8410e71 100644
--- a/src/controller/product/Product.php
+++ b/src/controller/product/Product.php
@@ -1,17 +1,17 @@
 <?php
 namespace controller\product;
 
-use controller\AbstractController;
 use repository\product\Product as ProductRepository;
 use core\Core;
-use router\Link;
+use router\link\Link;
+use controller\AbstractDefaultController;
 
 /**
  *
  * @author kevinfrantz
  *        
  */
-final class Product extends AbstractController implements ProductInterface
+final class Product extends AbstractDefaultController implements ProductInterface
 {
 
     /**
@@ -23,7 +23,7 @@ final class Product extends AbstractController implements ProductInterface
     public function __construct(Core $core)
     {
         parent::__construct($core);
-        $this->productRepository = new ProductRepository($this->core->getDatabase());
+        $this->productRepository = new ProductRepository($this->core);
     }
 
     public function list(?string $color = null): void
diff --git a/src/controller/standart/Standart.php b/src/controller/standart/Standart.php
index 65b3ca6..5e2dc63 100644
--- a/src/controller/standart/Standart.php
+++ b/src/controller/standart/Standart.php
@@ -1,43 +1,17 @@
 <?php
 namespace controller\standart;
 
-use controller\AbstractController;
-use router\Link;
+use controller\AbstractDefaultController;
 
 /**
  *
  * @author kevinfrantz
  *        
  */
-final class Standart extends AbstractController implements StandartInterface
+final class Standart extends AbstractDefaultController implements StandartInterface
 {
     public function homepage():void{
-        $this->render('standart/homepage.html.twig',['options'=>$this->getAllOptions()]);
-    }
-    
-    private function getAllOptions(){
-        return [
-            new Link([
-                'controller'=>'user',
-                'action'=>'login'
-            ],'login'),
-            new Link([
-                'controller'=>'user',
-                'action'=>'logout'
-            ],'logout'),
-            new Link([
-                'controller'=>'user',
-                'action'=>'register'
-            ],'register'),
-            new Link([
-                'controller'=>'product',
-                'action'=>'list'
-            ],'product list'),
-            new Link([
-                'controller'=>'order',
-                'action'=>'basket'
-            ],'basket'),
-        ];
+        $this->render('standart/homepage.html.twig');
     }
 }
 
diff --git a/src/repository/AbstractRepository.php b/src/repository/AbstractRepository.php
index 4deca72..b21f0e0 100644
--- a/src/repository/AbstractRepository.php
+++ b/src/repository/AbstractRepository.php
@@ -1,8 +1,11 @@
 <?php
 namespace repository;
 
+use core\CoreInterface;
+use entity\user\UserInterface;
+
 /**
- *
+ * 
  * @author kevinfrantz
  *        
  */
@@ -13,8 +16,14 @@ abstract class AbstractRepository
      */
     protected $database;
     
-    public function __construct(\PDO $database){
-        $this->database = $database;
+    /**
+     * @var UserInterface
+     */
+    protected $user;
+    
+    public function __construct(CoreInterface $core){
+        $this->database = $core->getDatabase();
+        $this->user = $core->getUser();
     }
 }
 
diff --git a/src/router/Link.php b/src/router/Link.php
deleted file mode 100644
index 4c3c544..0000000
--- a/src/router/Link.php
+++ /dev/null
@@ -1,52 +0,0 @@
-<?php
-namespace router;
-
-/**
- * A link containes out of get parameters
- * @author kevinfrantz
- *        
- */
-final class Link
-{
-    /** 
-     * ArrayCollection would be nicer but I have to save time ;)
-     * @var array
-     */
-    private $parameters;
-
-    /**
-     * 
-     * @var string
-     */
-    private $name;
-    
-    public function __construct(array $parameters=[],string $name = ''){
-        $this->setParameters($parameters);
-        $this->setName($name);
-    }
-    
-    public function setParameters(array $parameters):void{
-        $this->parameters = $parameters;
-    }
-    
-    public function setName(string $name):void{
-        $this->name = $name;
-    }
-    
-    public function getName():string{
-        return $this->name;
-    }
-    
-    public function getUrl():string{
-        return "index.php".$this->getParameters(); 
-    }
-        
-    private function getParameters():string{
-        $parameters = '?';
-        foreach ($this->parameters as $key=>$value){
-            $parameters .= $key.'='.$value.'&';
-        }
-        return $parameters;
-    }
-}
-
diff --git a/src/router/Router.php b/src/router/Router.php
index a4cb004..6ea62f8 100644
--- a/src/router/Router.php
+++ b/src/router/Router.php
@@ -14,7 +14,10 @@ use controller\order\Order;
  */
 final class Router implements RouterInterface
 {
-
+    const CONTROLLER='controller';
+    
+    const ACTION = 'action';
+    
     /**
      *
      * @var CoreInterface
@@ -38,10 +41,10 @@ final class Router implements RouterInterface
     public function route()
     {
         if ($this->get) {
-            switch ($this->get['controller']) {
+            switch ($this->get[self::CONTROLLER]) {
                 case 'user':
                     $userController = new User();
-                    switch ($this->get['action']) {
+                    switch ($this->get[self::ACTION]) {
                         case 'login':
                             return $userController->login();
                         case 'logout':
@@ -51,13 +54,13 @@ final class Router implements RouterInterface
                     }
                 case 'product':
                     $productController = new Product($this->core);
-                    switch ($this->get['action']) {
+                    switch ($this->get[self::ACTION]) {
                         case 'list':
                             return $productController->list(($this->get['color'])?$this->get['color']:null);
                     }
                 case 'order':
                     $orderController = new Order($this->core);
-                    switch ($this->get['action']){
+                    switch ($this->get[self::ACTION]){
                         case 'store':
                             return $orderController->store();
                         case 'basket':
diff --git a/src/router/Button.php b/src/router/link/Button.php
similarity index 91%
rename from src/router/Button.php
rename to src/router/link/Button.php
index 54cf207..f9e7e58 100644
--- a/src/router/Button.php
+++ b/src/router/link/Button.php
@@ -1,5 +1,5 @@
 <?php
-namespace router;
+namespace router\link;
 
 /**
  * A button containes out of a link and post parameters
diff --git a/src/router/link/Link.php b/src/router/link/Link.php
new file mode 100644
index 0000000..78a96fd
--- /dev/null
+++ b/src/router/link/Link.php
@@ -0,0 +1,71 @@
+<?php
+namespace router\link;
+
+/**
+ * A link containes out of get parameters
+ *
+ * @author kevinfrantz
+ *        
+ */
+final class Link implements LinkInterface
+{
+
+    /**
+     * ArrayCollection would be nicer but I have to save time ;)
+     *
+     * @var array
+     */
+    private $parameters;
+
+    /**
+     *
+     * @var string
+     */
+    private $name;
+
+    public function __construct(array $parameters = [], string $name = '')
+    {
+        $this->setParameters($parameters);
+        $this->setName($name);
+    }
+
+    public function setParameters(array $parameters): void
+    {
+        $this->parameters = $parameters;
+    }
+
+    public function setName(string $name): void
+    {
+        $this->name = $name;
+    }
+
+    public function getName(): string
+    {
+        return $this->name;
+    }
+
+    public function getUrl(): string
+    {
+        return "index.php" . $this->getParameters();
+    }
+
+    private function getParameters(): string
+    {
+        $parameters = '?';
+        foreach ($this->parameters as $key => $value) {
+            $parameters .= $key . '=' . $value . '&';
+        }
+        return $parameters;
+    }
+
+    public function isActive(): bool
+    {
+        foreach ($this->parameters as $key => $parameter) {
+            if (! array_key_exists($key, $_GET) || (array_key_exists($key, $_GET) && $_GET[$key]!==$parameter)) {
+                return false;
+            }
+        }
+        return true;
+    }
+}
+
diff --git a/src/router/link/LinkInterface.php b/src/router/link/LinkInterface.php
new file mode 100644
index 0000000..eec6dee
--- /dev/null
+++ b/src/router/link/LinkInterface.php
@@ -0,0 +1,17 @@
+<?php
+namespace router\link;
+
+/**
+ *
+ * @author kevinfrantz
+ *        
+ */
+interface LinkInterface
+{
+    public function getName():string;
+    
+    public function getUrl():string;
+    
+    public function isActive():bool;
+}
+
diff --git a/src/template/frames/default.html.twig b/src/template/frames/default.html.twig
index 7f97a84..6f7238f 100644
--- a/src/template/frames/default.html.twig
+++ b/src/template/frames/default.html.twig
@@ -1,10 +1,7 @@
 {% extends "base.html.twig" %}
 {% block body %}
+{% include 'frames/structure/navbar.html.twig' with menu_items %}
 <div class="container">
-	<div class="page-header">
-		<h1>Online Shop</h1>
-		<hr />
-	</div>
 	{% block content %}
 	{% endblock %}
 </div>
diff --git a/src/template/frames/structure/navbar.html.twig b/src/template/frames/structure/navbar.html.twig
new file mode 100644
index 0000000..b0687c2
--- /dev/null
+++ b/src/template/frames/structure/navbar.html.twig
@@ -0,0 +1,32 @@
+<nav class="navbar navbar-expand-lg navbar-light bg-light">
+  <a class="navbar-brand" href="/">Online Shop</a>
+  <button class="navbar-toggler" type="button" data-toggle="collapse" data-target="#navbarSupportedContent" aria-controls="navbarSupportedContent" aria-expanded="false" aria-label="Toggle navigation">
+    <span class="navbar-toggler-icon"></span>
+  </button>
+  <div class="collapse navbar-collapse" id="navbarSupportedContent">
+    <ul class="navbar-nav mr-auto">
+      {% for item in menu_items %}
+          <!--<li class="nav-item active">
+            <a class="nav-link" href="#">Home <span class="sr-only">(current)</span></a>
+          </li>
+          -->
+          <li class="nav-item {% if item.active %}active{% endif %}">
+            <a class="nav-link" href="{{ item.url }}">{{ item.name }}</a>
+          </li>
+          <!--
+          <li class="nav-item dropdown">
+            <a class="nav-link dropdown-toggle" href="#" id="navbarDropdown" role="button" data-toggle="dropdown" aria-haspopup="true" aria-expanded="false">
+              Dropdown
+            </a>
+            <div class="dropdown-menu" aria-labelledby="navbarDropdown">
+              <a class="dropdown-item" href="#">Action</a>
+              <a class="dropdown-item" href="#">Another action</a>
+              <div class="dropdown-divider"></div>
+              <a class="dropdown-item" href="#">Something else here</a>
+            </div>
+          </li>
+           -->
+      {% endfor %}
+    </ul>
+  </div>
+</nav>
\ No newline at end of file
diff --git a/src/template/product/list.html.twig b/src/template/product/list.html.twig
index d820088..349c65c 100644
--- a/src/template/product/list.html.twig
+++ b/src/template/product/list.html.twig
@@ -24,7 +24,7 @@
 			<b>price:</b>
 			<ul>
 				<li>{{ product.getPrice.getNetto.getFloat }} {{ product.getPrice.getNetto.getSymbol }} <i>(net)</i></li>
-				<li>{{ product.getPrice.getGross.getFloat }} {{ product.getPrice.getGross.getSymbol }} <i>(gross)</i></li>
+				<li>{{ product.getPrice.getGross.getFloat }} {{ product.getPrice.getGross.getSymbol }} <i>(gross)</i>, Tax: {{ product.getPrice.getTax }} %</li>
 			</ul>
 			</span>
 			<a href="#" class="btn btn-primary">Add to basket</a>
diff --git a/src/template/standart/homepage.html.twig b/src/template/standart/homepage.html.twig
index fd5ce3c..9268337 100644
--- a/src/template/standart/homepage.html.twig
+++ b/src/template/standart/homepage.html.twig
@@ -4,7 +4,7 @@
 <h2>Welcome to the online shop!</h2>
 You have the following options:
 <ul>
-{% for option in options %}
+{% for option in menu_items %}
   <li>
     <a href="{{option.getUrl}}">{{option.getName}}</a>
   </li>