All photographs come from Wikimedia Commons and are either in the public domain (including CC0) or licensed under Creative Commons. We resize them for the web and do not otherwise alter them. Licence terms for CC BY and CC BY-SA images require attribution, which is given below and under each image. If you are a rights holder and believe an image is credited wrongly, see our copyright & takedown page.
| Used on | File (Wikimedia Commons) | Author / source | Licence |
|---|
| Great Sphinx of Giza | Sphinx partially excavated2.jpg | Maison Bonfils (Beirut, Lebanon), photographers : Félix (1831-1885), his wife, Lydie (1837-1918) and his son, Adrien (1861-1929). Most possible done by Félix (between 1867 and 1899date QS:P) | Public domain |
| Giza pyramids | Spelterini Pyramids.jpg | Eduard Spelterini (Created: November 21, 1904. Fi) | Public domain |
| Gunung Padang | Gunung Padang Megalithic Sites 01.jpg | Gilangsmntr (2017-06-08) | CC BY-SA 4.0 |
| Caral (Sacred City of Caral-Supe) | Huaca Caral 4.jpg | Ariana zafra (2022-12-02 13:30:45) | CC BY-SA 4.0 |
| Great Pyramid of Cholula (Tlachihualtépetl) | Gran Pirámide de Cholula, Puebla, México, 2013-10-12, DD 10.JPG | Diego Delso (2013-10-12 11:15:49) | CC BY-SA 3.0 |
| Teotihuacan: Pyramid of the Sun | Pyramid of the Sun, Teotihuacan, from path to parking lot.jpg | Daniel Case (2015-07-21) | CC BY-SA 3.0 |
| Pyramids of Meroë | Sudan Meroe Pyramids 30sep2005 2.jpg | Fabrizio Demartis (2005-09-30) | CC BY-SA 2.0 |
| Göbekli Tepe | Göbekli Tepe Enclosure C Pillar 27 relief.jpg | Kerimove (2026-07-23 11:07:16) | CC0 |
| Karahan Tepe | Karahan Tepe overview.jpg | Frantisek Trampota (2024-11-06 10:19:07) | Public domain |
| Baalbek megaliths | Baalbek stone.jpg | SenemmTSR (2010-06-23) | Public domain |
| Sacsayhuamán and Ollantaytambo | Walls at Sacsayhuaman.jpg | Bcasterline at English Wikipedia (18 March 2006 (original upload) | Public domain |
| Stonehenge | Stonehenge2007 07 30.jpg | garethwiscombe (2007-07-30) | CC BY 2.0 |
| Carnac alignments | Alignement Menec Carnac.jpg | Myrabella (2010-04-29) | CC BY-SA 3.0 |
| Nan Madol | Nan madol.jpg | NOAA | Public domain |
| Yonaguni Monument | Yonaguni Monument Twin Megaliths.jpg | Melkov (2013-05-03 09:13:02) | CC0 |
Papers are cited by DOI, resolved through Crossref and doi.org. We summarise findings in our own words and link to the originals. Short quotations, where used, are attributed.
