More than 25 years ago, Michel Guyot, the owner of a French château, launched an experimental castle-building project. Workers using tools and techniques from the 13th century have now completed most of Guédelon Castle, and about 300,000 visitors a year come to watch and learn.
Photos: Building a Medieval Castle in the 21st Century
Aufort Jerome / Getty
An aerial view of Guédelon Castle in Treigny, France, in 2023
