The castle is built entirely within the walls of an abandoned sandstone quarry.
Mortar is mixed on-site using sand, lime, and water, consistent with medieval chemistry.
The site operates without the use of electricity or modern machinery.
Draft horses are used to transport stone blocks and timber, replacing internal combustion engines.
Archaeologists and historians provide constant oversight to ensure historical accuracy in every construction phase.
Wood used for scaffolding and roof structures is harvested from the surrounding forest.
The castle includes a functional mill that is also constructed using medieval engineering principles.
Guédelon is an experimental archaeology project where a 13th-century castle is being constructed from scratch using only medieval techniques and local materials. Work began in 1997 in the Puisaye forest of Burgundy. Builders utilize period-accurate tools including stone hammers, iron chisels, and hemp ropes. All site workers, including stonemasons, blacksmiths, and woodcutters, perform their tasks in full view of visitors. The project follows a strict architectural model based on the principles of Philip II of France. As of 2026, the construction remains ongoing, allowing observers to see the evolution of the structure over decades. The project serves as both an educational site and a living laboratory for historical research.
The elevated viewing bridge offers a comprehensive panoramic view of the entire castle courtyard and the ongoing work on the towers.
Wear sturdy, closed-toe footwear suitable for walking on uneven, muddy, or dusty construction paths.
Allocate time to speak with the various artisans, who are often willing to explain their specific tools and methods.
Check the site map upon arrival, as the construction layout changes significantly from year to year.
Do not attempt to touch tools or materials in active work zones, as the construction site is a real workplace with heavy equipment.
The site is open seasonally, typically from spring through autumn, and remains closed during the winter months.
Maintain a safe distance from active work zones; follow all cordoned-off paths and respect the safety of the artisans.
