With a very specific historical context:
The “Middle Ages”, represent over a thousand years of human history, therefore, in order to avoid confusing the different architectural styles of the age, the Guédelon venture adopted a specific chronological and historical timeframe. The start date for the castle was taken as 1229.
Louis IX, the future Saint Louis, was crowned King in Rhiems, three years ago in 1226. However, he was a mere twelve years of age and therefore his mother, Blanche of Castile, acts as Regent until 1235.
Locally, Puisaye is under the control of Baron Jean de Toucy. To the south-east lies the county of Auxerre-Nevers, controlled by Mahaut de Courtenay, and in the north the Capetian lands of Gâtinais. On the eve of the sixth crusade, Puisaye is enjoying a period of relative peace and stability.
Interesting stuff!