{ "version": 1, "id": "north-face-to-kings-chamber", "title": "From Bedrock to the King's Chamber", "subtitle": "A continuous evidence expedition through Khufu's documented architecture", "startStopId": "plateau", "endStopId": "king-chamber", "graphStartId": "entrance-approach", "graphEndId": "king-chamber", "sources": [ { "id": "ministry-khufu", "title": "Egyptian Ministry of Tourism and Antiquities: The Great Pyramid", "url": "https://egymonuments.gov.eg/en/monuments/the-great-pyramid/", "supports": "Accepted monument history, materials, original height, and principal chambers" }, { "id": "petrie-survey", "title": "W. M. Flinders Petrie, The Pyramids and Temples of Gizeh", "url": "https://gizapyramids.org/pdf_library/petrie_gizeh.pdf", "supports": "Measured passage, chamber, level, and masonry relationships" }, { "id": "digital-giza-khufu", "title": "Harvard Digital Giza: Khufu", "url": "https://giza.fas.harvard.edu/ancientpeople/202/full/", "supports": "Khufu identity, chronology, names, and linked archaeological records" }, { "id": "digital-giza-complex", "title": "Harvard Digital Giza: Royal Pyramid Complexes", "url": "https://giza.fas.harvard.edu/lessons/royal-pyramid-complexes/", "supports": "The architectural role of pyramid temples, causeways, enclosure, and plateau planning" }, { "id": "khufu-entrance-photo", "title": "Published photograph of Khufu's north entrance", "url": "https://commons.wikimedia.org/wiki/File:Pyramid_of_Khufu_-_Entrance.jpg", "supports": "Surviving chevrons, entrance recess, weathering, and irregular exterior masonry" }, { "id": "khufu-block-photo", "title": "Published close photograph of Khufu's exposed core", "url": "https://commons.wikimedia.org/wiki/File:The_Great_Pyramid_upclose.JPG", "supports": "Present block scale, worn edges, recessed joints, and non-uniform erosion" }, { "id": "perring-marks", "title": "Perring and Birch, quarry marks in the Great Pyramid", "url": "https://digi.ub.uni-heidelberg.de/diglit/perring1839bd1/0005", "supports": "Primary publication of red construction marks in the relieving chambers" }, { "id": "roth-phyles", "title": "Ann Macy Roth, Egyptian Phyles in the Old Kingdom", "url": "https://isac.uchicago.edu/sites/default/files/uploads/shared/docs/saoc48.pdf", "supports": "Work-gang names and their distribution in Khufu's relieving chambers" }, { "id": "hawass-texts", "title": "Zahi Hawass, Architectural Development of the Egyptian Royal Tomb", "url": "https://gizamedia.rc.fas.harvard.edu/documents/hawass_treasures_046-049.pdf", "supports": "Pyramid Texts first appear later under Unas, not in Khufu's accessible chambers" }, { "id": "allen-berkley", "title": "Allen and Berkley, Image Method for Room Acoustics", "url": "https://jontallen.ece.illinois.edu/uploads/537.F18/Papers/Public/Allen-PDFs/AllenBerkley79.pdf", "supports": "The mathematical basis and limits of the exhibit's early-reflection visualization" } ], "encounters": [ { "id": "plateau-datum", "order": 1, "title": "A Surveyed Limestone Plateau", "shortTitle": "Plateau datum", "category": "site", "confidence": "documented", "required": true, "zone": "plateau", "position": [-205, -0.4, 188], "radius": 14, "sourceIds": ["ministry-khufu", "digital-giza-complex", "petrie-survey"], "summary": "The pyramid was set out on a carefully prepared limestone plateau. The exhibit uses Khufu's foundation as its zero-height datum.", "details": "The surrounding terrain comes from a georeferenced SRTM crop, while the monument and interior use survey-led metric geometry. The terrain is locally conditioned only across engineered pyramid foundations so a radar return is not mistaken for natural relief.", "whyItMatters": "A shared datum keeps the exterior, entrance, passages, chambers, collision body, and map registered to the same physical scale.", "nextHint": "Follow the Lens marker around Khufu toward the north approach." }, { "id": "tura-casing", "order": 2, "title": "Lost Tura Limestone Casing", "shortTitle": "Lost casing", "category": "material", "confidence": "reconstructed", "required": true, "zone": "khufu-entrance", "position": [0, 2.2, -158], "radius": 13, "compareEra": true, "sourceIds": ["ministry-khufu", "khufu-block-photo", "petrie-survey"], "summary": "Khufu's local-limestone core was originally faced with high-quality Tura limestone. Almost all of that smooth outer surface is now gone.", "details": "The material program is documented, but the exact color, polish, joint visibility, weather, and moment-to-moment appearance shown in Heyday mode are reconstructed. Present mode instead exposes irregular surviving core blocks.", "whyItMatters": "The surviving stepped silhouette and the original geometric face are different archaeological states, not two competing pyramid shapes.", "nextHint": "Climb the prepared north approach to the original entrance." }, { "id": "original-entrance", "order": 3, "title": "The Original North Entrance", "shortTitle": "Original entrance", "category": "architecture", "confidence": "documented", "required": true, "zone": "khufu-entrance", "position": [0, 16.7, -110.5], "radius": 7, "compareEra": true, "sourceIds": ["petrie-survey", "khufu-entrance-photo", "ministry-khufu"], "summary": "The original descending passage begins high on the north face beneath massive chevron stones.", "details": "Published surveys and photographs anchor the passage mouth, elevation, face plane, and surviving chevrons. The exhibit keeps the opening connected to both its exterior approach and enclosed descending passage.", "whyItMatters": "The entrance is a structural transition through the pyramid face, not a decorative arch floating in front of it.", "nextHint": "Enter the low descending passage. Your visitor stance will crouch automatically." }, { "id": "descending-clearance", "order": 4, "title": "Human Scale in the Descending Passage", "shortTitle": "Descending clearance", "category": "movement", "confidence": "documented", "required": true, "zone": "known-interior", "position": [0, 12.8, -92.6], "radius": 4, "sourceIds": ["petrie-survey"], "summary": "The descending passage is only about 1.15 meters wide and 1.25 meters high in this survey-led reconstruction.", "details": "A six-foot visitor cannot stand here. Collision, camera height, wall cuts, and route validation all use the same authored clearance instead of hiding the constraint with a larger invisible tunnel.", "whyItMatters": "The bodily experience of crouching is architectural evidence: scale changes how the route is understood.", "nextHint": "Continue down to the point where the ascending route branches upward." }, { "id": "ascending-junction", "order": 5, "title": "The Ascending Branch", "shortTitle": "Ascending junction", "category": "route", "confidence": "documented", "required": true, "zone": "known-interior", "position": [0, -1.6, -61], "radius": 4.5, "sourceIds": ["petrie-survey", "ministry-khufu"], "summary": "The ascending passage branches from the descending route and climbs into the pyramid's upper chamber system.", "details": "The exhibit's clearance-aware portal graph joins the surveyed descending and ascending centerlines at this physical junction. It does not use a hidden teleport or an overlapping decorative tube.", "whyItMatters": "This branch links the entrance route, Grand Gallery, Queen's Chamber passage, and King's Chamber into one traversable system.", "nextHint": "Turn uphill and follow the low ascending passage." }, { "id": "gallery-threshold", "order": 6, "title": "From Low Passage to Grand Gallery", "shortTitle": "Gallery threshold", "category": "architecture", "confidence": "documented", "required": true, "zone": "known-interior", "position": [0, 21, -23.2], "radius": 4.5, "sourceIds": ["petrie-survey", "ministry-khufu"], "summary": "The low ascending route opens into a corbelled gallery nearly nine meters high.", "details": "The abrupt change in height is preserved in geometry, lighting, camera clearance, and sound. At this same level, a horizontal passage branches toward the chamber conventionally called the Queen's Chamber.", "whyItMatters": "The threshold makes the gallery's scale legible without exaggerating its width or turning it into a cathedral nave.", "nextHint": "Look toward the horizontal branch before continuing upward." }, { "id": "acoustic-purpose-claim", "order": 7, "title": "Geometry Is Not Proof of Acoustic Intent", "shortTitle": "Acoustic claim", "category": "method", "confidence": "disputed", "required": false, "zone": "known-interior", "position": [0.55, 21, -20.4], "radius": 4, "sourceIds": ["allen-berkley", "petrie-survey"], "summary": "The chambers and passages reflect sound, but that does not establish that Khufu's builders designed an acoustic machine.", "details": "The exhibit's audible probe uses direct sound plus six first-order image-source reflections. It is a geometry lesson, not archaeological proof of intention; limestone scattering, late reverberation, diffraction, and original surface conditions remain insufficiently measured.", "whyItMatters": "A simulation can demonstrate consequences of geometry without turning those consequences into historical purpose.", "nextHint": "Continue into the Grand Gallery and inspect its corbelled walls." }, { "id": "gallery-corbelling", "order": 8, "title": "Corbelled Stone Courses", "shortTitle": "Gallery corbelling", "category": "construction", "confidence": "documented", "required": true, "zone": "known-interior", "position": [0, 31.7, -3.1], "radius": 5.5, "sourceIds": ["petrie-survey"], "summary": "Successive wall courses project inward as the Grand Gallery rises.", "details": "The gallery's tall section, sloping floor, side benches, and corbelled narrowing are survey-led. Surface images add stone character but do not redefine the measured envelope or collision boundary.", "whyItMatters": "Separating measured form from surface appearance prevents a photograph or generated texture from silently changing the architecture.", "nextHint": "Inspect the next marker before entering the upper passage." }, { "id": "gallery-purpose", "order": 9, "title": "A Documented Form with an Unknown Purpose", "shortTitle": "Gallery purpose", "category": "interpretation", "confidence": "unknown", "required": false, "zone": "known-interior", "position": [-0.7, 35.8, 4.9], "radius": 5, "sourceIds": ["petrie-survey", "ministry-khufu"], "summary": "The Grand Gallery's form is measurable. Its complete construction role and intended meaning are not established by geometry alone.", "details": "This exhibit reconstructs the surviving space and labels proposed explanations as interpretation. It does not use visual confidence as a substitute for archaeological certainty.", "whyItMatters": "Museum accuracy includes preserving unanswered questions.", "nextHint": "Climb to the low passage leading into the King's Chamber." }, { "id": "king-passage", "order": 10, "title": "The Final Constricted Passage", "shortTitle": "King's passage", "category": "route", "confidence": "documented", "required": true, "zone": "known-interior", "position": [0, 41.7, 19.7], "radius": 4, "sourceIds": ["petrie-survey"], "summary": "After the Grand Gallery, the route compresses again before reaching the granite chamber.", "details": "The authored centerline, floor rise, crouched clearance, and chamber portal share one collision and rendering contract. The route solver proves that a six-foot visitor can pass without clipping through a wall or ceiling.", "whyItMatters": "A connected exhibit must preserve difficult transitions, not hide them behind map jumps.", "nextHint": "Pass through the doorway into the red-granite chamber." }, { "id": "king-chamber-masonry", "order": 11, "title": "Granite Chamber and Sarcophagus", "shortTitle": "King's Chamber", "category": "material", "confidence": "documented", "required": true, "zone": "known-interior", "position": [-3.25, 43, 28.5], "radius": 4.5, "sourceIds": ["petrie-survey", "ministry-khufu", "hawass-texts"], "epigraphyRef": "giza-pyramid-text-policy", "summary": "Red granite forms the chamber walls and Khufu's surviving sarcophagus. Formal Pyramid Text decoration does not belong here.", "details": "The room envelope and coffer are survey-led. Warm exhibit lighting makes the space readable without painting later tomb imagery, treasure, or generic hieroglyphs onto the masonry.", "whyItMatters": "Undecorated stone is evidence, not an unfinished art asset.", "nextHint": "Inspect the final marker to learn where Khufu's builders actually left written marks." }, { "id": "relieving-chamber-marks", "order": 12, "title": "Builders' Marks Above, Not on These Walls", "shortTitle": "Builders' marks", "category": "epigraphy", "confidence": "documented", "required": true, "zone": "known-interior", "position": [1, 43, 30.7], "radius": 4, "sourceIds": ["perring-marks", "roth-phyles", "digital-giza-khufu"], "epigraphyRef": "khufu-relieving-chamber-marks", "summary": "Red quarry and work-gang marks occur in inaccessible construction chambers above this room.", "details": "Those marks include royal-name occurrences and help identify construction organization. The normalized reading is useful catalog information, but it is not relocated or painted into the accessible King's Chamber.", "whyItMatters": "Location, handwriting, damage, and access context are part of an inscription's meaning.", "nextHint": "The essential evidence chain is complete. Review it in your Field Notebook." } ] }