In pictures: Chateau de Guedelon in the Burgundy region of France being built using the techniques, materials and rules of the 13th Century

Chateau de Guedelon near Treigny in the Burgundy region of France is the brainchild of Michel Guyot, local landowner, and business woman Maryline Martin, now site's managing director, and has been in construction since June 1997 when the first stone was laid.

What started out as an eccentric project is now an established enterprise, employing 65 people and drawing in visitors from around Europe every year. The medieval castle will be finished around 2030.

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