{% sponsor_levels as levels %}

<h4>Sponsors</h4>

<div class="sponsor-list">

    {% for level in levels %}

        {% if level.sponsors %}

            <h3 style="margin-top: 3em;">{{ level.name }}</h3>

            {% for sponsor in level.sponsors %}

                <div style="margin: 10px 0;">

                    <a href="{{ sponsor.external_url }}">

                        <img src="{% thumbnail sponsor.website_logo '100x60' %}" alt="{{ sponsor.name }}" />

                    </a>

                </div>