Heliograph<p>Long before <a href="https://mastodon.au/tags/Sydney" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>Sydney</span></a> Opera House excavations began in the 1950s, the site – known as Tubowgule – was a meeting point for the local <a href="https://mastodon.au/tags/Gadigal" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>Gadigal</span></a> people of the <a href="https://mastodon.au/tags/Eora" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>Eora</span></a> nation. </p><p>The area was strewn with the debris of family feasts and ceremonies, creating myriad ancestral middens over thousands of years.</p><p>With the arrival of the first fleet, convict women were put to work collecting the oyster shells and bones from the middens, burning them down to create the lime that formed the cement mortar that built Australia’s first Government House, which overlooks <a href="https://mastodon.au/tags/Bennelong" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>Bennelong</span></a> Point to this day. </p><p><a href="https://www.theguardian.com/culture/2023/sep/26/sydney-opera-house-85000-oyster-shells-tell-of-sites-true-story-in-major-public-artwork" rel="nofollow noopener noreferrer" target="_blank"><span class="invisible">https://www.</span><span class="ellipsis">theguardian.com/culture/2023/s</span><span class="invisible">ep/26/sydney-opera-house-85000-oyster-shells-tell-of-sites-true-story-in-major-public-artwork</span></a></p>