This documentary is in French, so I apologize for the non-French speakers.
It explains the building of a Guédelon castle
This castle started to be built about 25 years ago, BUT following as close as possible techniques (no machine, no gasoil, no electricity), equipment, architecture of the time. Before deciding to build this castle, the create a plausible scenario for the time and the location, imagining that a minor noble got permission to build a small castle.
This documentary will walk you through many steps and professions required to build this castle.
The size looks perfect for a covenant.
It is a follow-up of this initial topic.