A view of the construction site of the Chateau de Guedelon near Treigny in the Burgundy region of France, on September 13, 2016. #

An earlier view of the construction site of a medieval fort called Guedelon, that is being built in France near Auxerre, on June 25, 2005. #

Laborers use handmade tools to work on stone meant for Guedelon, on June 25, 2005. #

A picture taken on April 11, 2005 shows a map of the final look of the Chateau de Guedelon. #

A laborer in a horse-drawn carriage works on the medieval fort called Guedelon. #

Clement Guerard, blacksmith at the site since 1999, poses in his workshop on October 29, 2013. #

British engineering student Cloe, from Northampton, walks in a winch drum at the construction site of the Chateau de Guedelon on October 29, 2013. #

A view of the construction site of the Chateau de Guedelon on September 13, 2016. #

A woman plays with geese at the construction site of the Chateau de Guedelon on September 13, 2016. #

Thierry Baupain, woodcutter at the site since 1999, at the construction site of the Chateau de Guedelon, on October 29, 2013. #

A view of a log wall, part of Guedelon, on June 25, 2005. #

A view of the construction site of the Guedelon Castle, on September 13, 2016. #

A laborer using handmade tools works on Guedelon, near Auxerre, France, on June 25, 2005. #

A blueprint and a model of the Chateau de Guedelon are displayed at the construction site on October 29, 2013. #

A man works at the construction site of the Chateau de Guedelon on September 13, 2016. #

A view of stone work outside the site of the Chateau de Guedelon on September 13, 2016. #

A stonecutter works outside the Chateau de Guedelon on September 13, 2016. #

View of the castle bedroom inside the Chateau de Guedelon on October 29, 2013. #

View of the timber work inside castle bedroom on October 29, 2013. #

Workers carry stones at the construction site on September 13, 2016. #

A view of the under-construction Guedelon Castle in the Burgundy region of France, on September 13, 2016. #