symposion_app/pinaxcon/templates/cms_pages/content_page_blocks/colophon.html

{% load pyconau2017_tags %}

<ul>
  {% all_images as images %}
  {% for image in images %}
    <li>
      <a href="{{ image.source_url }}">{{ image.title }}</a> &ndash; &copy;{{ image.copyright_year }} {{ image.licence }} by {{ image.author }}
    </li>
  {% endfor %}
</ul>