potentail back url

src/project/templates/project/breadcrumb.html

@@ -0,0 +1,11 @@
+{% load i18n %}
+
+{% with ancestors|last as last %}
+    {% if ancestors|length > 3 or request.current_page.parent.reverse_id == 'calendar' or request.current_page.parent.reverse_id == 'news' %}
+        <a href="{{ last.parent.get_absolute_url }}" class="button button--small">
+            <span class="button__icon">{% include 'project/assets/arrow-left-long.svg' %}</span>
+            <span class="button__text">{% trans 'Zurück' %}</span>
+        </a>
+        <br><br><br>
+    {% endif %}
+{% endwith %}

src/project/templates/project/includes/content_intro.html

@@ -1,7 +1,8 @@
-{% load i18n cms_tags thumbnail %}
+{% load i18n cms_tags menu_tags thumbnail %}
 
 <div class="content__intro reveal_container reveal_self reveal reveal_animation{% if image %} image{% endif %}">
     <div class="content__intro__content reveal reveal_animation">
+{#        {% show_breadcrumb 'project/breadcrumb.html' %}#}
         <h1>
             {% if content_title %}
                 {{ content_title }}