app/Resources/TwigBundle/views/Exception/error404.html.twig
{% extends 'MainBundle::base.html.twig' %}
{% block content %}
<div class="row">
<div class="col-xs-12 text-center">
<h2>Woops.</h2>
</div>
</div>
<div class="row">
<div class="col-xs-12 text-center">
<h3>This page doesn't exist.</h3>
</div>
</div>
<div class="row">
<div class="col-xs-12 text-center">
<img class="img-thumbnail" src="{{ asset('images/tanner.jpg') }}" alt="Whaaaat?" />
</div>
</div>
<div class="row"> </div>
<div class="row">
<div class="col-xs-12 text-center">
<a href="{{ path('index') }}">
<i class="fa fa-home"></i>
Go to Main page
</a>
</div>
</div>
{% endblock %}