Cross section of the cross showing the route up to the observatory, supported by scaffolding, erected for the purpose of creating a panorama of London.  1849
<br>Lithograph
1849<div style="display: none;">date QS:P571,+1849-00-00T00:00:00Z/9</div>
<a rel="nofollow" class="external free" href="https://www.britishmuseum.org/collection/object/P_1880-1113-5930">https://www.britishmuseum.org/collection/object/P_1880-1113-5930</a>