Archaeologists found that people (Romans) long ago used to build fires in shallow holes in their floors.
<a rel="nofollow" class="external text" href="https://www.flickr.com/people/25211209@N03">to lobato</a> from Lisbon, Portugal
CC BY 2.0
<a rel="nofollow" class="external text" href="https://www.flickr.com/photos/25211209@N03/3113485401/">"Rua dos Correeiros's Archaeological Centre" - Lisbon</a>