Editing Great Pyramid of Giza (section)

=== Descending Passage ===
From the original entrance, a passage descends through the masonry of the pyramid and then into the bedrock beneath it, ultimately leading to the Subterranean Chamber.

It has a slanted height of 4 [[Ancient Egyptian units of measurement|Egyptian feet]] (1.20 m; 3.9&nbsp;ft) and a width of {{convert|2|royal cubit|m+ft|1|bits (|)|abbr=on|disp=x}}. Its angle of 26°26'46" corresponds to a ratio of 1 to 2 (rise over run).{{sfn|Dormion|2004|p=284}}

After {{convert|28|m|ft}}, the lower end of the Ascending Passage is reached; a [[c:File:46 edgar.jpg|square hole]] in the ceiling, which is blocked by granite stones and might have originally been concealed. To circumvent these hard stones, a short tunnel was excavated that meets the end of the Robbers' Tunnel. This was expanded over time and fitted with stairs.

The passage continues to descend for another {{convert|72|m|ft}}, now through bedrock instead of the pyramid superstructure. Lazy guides used to block off this part with rubble to avoid having to lead people down and back up the long shaft, until around 1902 when [[Lorenzo Dow Covington|Covington]] installed a padlocked iron grill-door to stop this practice.{{sfn|Edgar|Edgar|1910|p=141}} Near the end of this section, on the west wall, is the connection to the vertical shaft that leads up to the Grand Gallery.

A horizontal shaft connects the end of the Descending Passage to the Subterranean Chamber, It has a length of {{convert|8.84|m|ft|abbr=on}}, width of {{convert|85|cm|ft|abbr=on}} and height of {{convert|91-95|cm|ft|abbr=on}}. A [[c:File:32 edgar.jpg|recess]] is located towards the end of the western wall, slightly larger than the tunnel, the ceiling of which is irregular and undressed.{{sfn|Maragioglio|Rinaldi|1965a|p=30}}