This photograph shows a technician capturing the sounds of manual labor performed by the builders of Guedelon Castle, who are using 13th-century techniques and tools to construct a fortified castle in Treigny, central eastern France, on September 11, 2025. Mylene Pardoen, "sound archaeologist", captures the sounds of a fortified castle under construction using 13th-century techniques to recreate the soundtrack of the Middle Ages. This former military helicopter mechanic has retrained as a musicologist. Combining her passion for history with her expertise in sound, she has invented her own profession, unique in the world: "sound archaeologist". (Photo by ARNAUD FINISTRE / AFP via Getty Images)