python-gallery/templates/error.html

{% extends 'layout.html' %}
{% block content %}
    <header>
        <img src="{{ url_for('static', filename='images/leaves.jpg') }}" alt="leaves"/>
        <span></span>
    </header>
    <div class="app">
        <h1>{{error}}</h1>
        <p>{{msg}}</p>
    </div>
{% endblock %}