# What is the Big Void above the Grand Gallery? · How the Great Pyramid was built > Four answers have been proposed. None is ahead on the evidence yet. Four are still possible. Source: https://mysteriesdept.com/mysteries/great-pyramid/questions/QST0CSMNVG411NF/what-is-the-big-void-above-the-grand-gallery Publisher: Mysteries Department Licence: CC BY 4.0 (credit Mysteries Department and link the page) Updated: 2026-10-26T11:57:32+00:00 --- **0** # What is the Big Void above the Grand Gallery? Asked 26 Oct 2026 by [**apollo** ](https://mysteriesdept.com/u/apollo)·4 answers·0·0 following **Four answers, none ahead** None is ahead yet. See what would settle it. ## Where it stands Four answers have been proposed. None is ahead on the evidence yet. Four are still possible. ## Why it matters It is the largest unknown space found inside the pyramid since the 19th century and its reading bears on the construction method and on whether sealed rooms remain⁠[[1]](https://mysteriesdept.com/sources/SRC0CSMNJ781SGV/discovery-of-a-big-void-in-khufus-pyramid-by-observation-of). ## Answers 4 [**A construction feature, such as a relieving space or a gallery left from building, with no contents.** ](https://mysteriesdept.com/mysteries/great-pyramid/answers/ANS0CSMP2321JGC/a-construction-feature-such-as-a-relieving-space-or-a) Not tested enough to call either way Evidence: 1 for Still possible [**A deliberate sealed chamber or second gallery.** ](https://mysteriesdept.com/mysteries/great-pyramid/answers/ANS0CSMP2JP1843/a-deliberate-sealed-chamber-or-second-gallery) Not tested enough to call either way Evidence: 1 for, 1 against Still possible [**None of these.** ](https://mysteriesdept.com/mysteries/great-pyramid/answers/ANS0CSMP3SR7QJW/none-of-these) Not tested enough to call either way Evidence: none yet Still possible [**Part of an internal construction ramp.** ](https://mysteriesdept.com/mysteries/great-pyramid/answers/ANS0CSMP3A46FZZ/part-of-an-internal-construction-ramp) Failed a test; not refuted outright Evidence: 1 against Disputed ## History 1. 2017[Morishima et al. puts forward: a deliberate sealed chamber or second gallery.](https://mysteriesdept.com/sources/SRC0CSMNJ781SGV/discovery-of-a-big-void-in-khufus-pyramid-by-observation-of) 1. 2017[Morishima et al. puts forward: part of an internal construction ramp.](https://mysteriesdept.com/sources/SRC0CSMNJ781SGV/discovery-of-a-big-void-in-khufus-pyramid-by-observation-of) 1. 2017[Morishima et al.: the void's cross-section resembles the Grand Gallery's and it is at least 30 m long.](https://mysteriesdept.com/sources/SRC0CSMNJ781SGV/discovery-of-a-big-void-in-khufus-pyramid-by-observation-of)For: A deliberate sealed chamber or second gallery. 1. 2017[Morishima et al.: the void lies above the Grand Gallery, deep inside the pyramid, not near the faces.](https://mysteriesdept.com/sources/SRC0CSMNJ781SGV/discovery-of-a-big-void-in-khufus-pyramid-by-observation-of)Against: Part of an internal construction ramp. 1. 2023[Procureur et al. puts forward: a construction feature, such as a relieving space or a gallery left from building, with no contents.](https://mysteriesdept.com/sources/SRC0CSMNJF23SCG/precise-characterization-of-a-corridor-shaped-structure-in) 1. 2023[Procureur et al.: the North Face Corridor, the other ScanPyramids find, proved on viewing to be a rough, empty space behind the…](https://mysteriesdept.com/sources/SRC0CSMNJF23SCG/precise-characterization-of-a-corridor-shaped-structure-in)For: A construction feature, such as a relieving space or a gallery left from building, with no contents. 1. 2026[Bundesanstalt für Materialforschung und -prüfung (BAM): no published imaging resolves its walls or ends.](https://mysteriesdept.com/sources/SRC0CSMNKEA4YTG/scanpyramids-inside-the-great-pyramid-guest-lecture-1)Against: A deliberate sealed chamber or second gallery. 1. 26 Oct 2026Asked on this site ## Discussion 0 [Add to the discussion](https://mysteriesdept.com/signin?next=/mysteries/great-pyramid/questions/QST0CSMNVG411NF/what-is-the-big-void-above-the-grand-gallery%23discussion) Help with this question [ **Propose an answer** Something the evidence could support or rule out ] [ **Propose an answer** Something the evidence could support or rule out ](https://mysteriesdept.com/signin?next=/mysteries/great-pyramid/questions/QST0CSMNVG411NF/what-is-the-big-void-above-the-grand-gallery%23add-answer) [ **Add evidence** A result for or against an answer ] [ **Add evidence** A result for or against an answer ](https://mysteriesdept.com/signin?next=/mysteries/great-pyramid/questions/QST0CSMNVG411NF/what-is-the-big-void-above-the-grand-gallery%23add-evidence) [ **Ask a sub-question** A smaller question that would help settle this one ] [ **Ask a sub-question** A smaller question that would help settle this one ](https://mysteriesdept.com/signin?next=/mysteries/great-pyramid/questions/QST0CSMNVG411NF/what-is-the-big-void-above-the-grand-gallery%23add-question) [ **Add a source** A paper, archive record or image ] [ **Add a source** A paper, archive record or image ](https://mysteriesdept.com/signin?next=/mysteries/great-pyramid/questions/QST0CSMNVG411NF/what-is-the-big-void-above-the-grand-gallery%23add-source) Where it fits How the Great Pyramid was built **What is the Big Void above the Grand Gallery?** Key question · you're here [ Ask a question under this one ]