More than 60 artisans have spent over two decades building a castle like it's 1230; it's still not finished

In the heart of France's Burgundy region, a unique historical experiment has been underway for over 25 years. Since 1997, more than 60 artisans have dedicated themselves to constructing a brand-new medieval castle, adhering strictly to the methods and materials available in the 13th century. This ambitious project, known as Guedelon Castle, began in an abandoned quarry and has transformed the site into a remarkable testament to traditional craftsmanship and sustainable building practices. The castle is not yet fully complete, but it now boasts walls, towers, a great hall, chapel, and kitchens, all built using techniques from around 1230. Workers utilize only hand tools, locally sourced stone, timber, and other materials that would have been common in the medieval period. Modern equipment is largely absent, with exceptions only for essential safety gear like boots and glasses. Visitors can immerse themselves in the sounds of hammers, horses, and blacksmiths at work, a stark contrast to the noise of modern construction. The builders meticulously study medieval ruins, historical records, and consult with archaeologists and historians. Master builder Florian Renucci describes the process as one of constant deduction and experimentation, citing challenges like understanding the exact operation of medieval drawbridges. The team has faced and overcome numerous hurdles, such as rebuilding a clay tile oven five times before achieving a functional design and developing waterproof mortar for the castle's cistern. Despite the ongoing work, Guedelon Castle has become a major attraction, drawing approximately 310,000 visitors annually. It stands as a living museum, showcasing archaeological research and traditional skills, proving that ambitious historical projects can still succeed through dedication and authentic methods.

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We know pulleys existed. But that's it. How did it work? In 1250, how exactly were two men able to raise and lower a 400-tonne drawbridge?