ConÂstrucÂtion sites are hives of speÂcialÂized activÂiÂty, but there’s no parÂticÂuÂlar trainÂing needÂed to ferÂry 500 lbs of stone sevÂerÂal stoÂries to the masons waitÂing above. All you need is the staÂmiÂna for a few steep flights and a medieval treadÂwheel crane or “squirÂrel cage.”
The techÂnolÂoÂgy, which uses simÂple geomÂeÂtry and human exerÂtion to hoist heavy loads, dates to ancient Roman times.
Retired in the VicÂtoÂriÂan era, it has been resÂurÂrectÂed and is being put to good use on the site of a forÂmer sandÂstone quarÂry two hours south of Paris, where the casÂtle of an imagÂiÂnary, low rankÂing 13th-cenÂtuÂry nobleÂman began takÂing shape in 1997.
There’s no typo in that timeÂline.
Château de GuĂ©deÂlon is an immerÂsive eduÂcaÂtionÂal project, an open air experÂiÂmenÂtal archeÂolÂoÂgy lab, and a highÂly unusuÂal workÂing conÂstrucÂtion site.
With a project timeÂline of 35 years, some 40 quarÂrypeoÂple, stoneÂmaÂsons, woodÂcutÂters, carÂpenÂters, tilers, blackÂsmiths, rope makÂers and carters can expect anothÂer ten years on the job.
That’s longer than a medieval conÂstrucÂtion crew would have takÂen, but unlike their 21st-cenÂtuÂry counÂterÂparts, they didÂn’t have to take freÂquent breaks to explain their labors to the visÂitÂing pubÂlic.
A team of archeÂolÂoÂgists, art hisÂtoÂriÂans and castelÂlolÂoÂgists strive for authenÂticÂiÂty, eschewÂing elecÂtricÂiÂty and any vehiÂcle that doesÂn’t have hooves.
Research mateÂriÂals include illuÂmiÂnatÂed manÂuÂscripts, stained glass winÂdows, finanÂcial records, and existÂing casÂtles.
The 1425-year-old CanÂterÂbury CatheÂdral has a non-reproÂducÂtion treadÂmill crane stored in its rafters, as well as a levers and pulÂleys activÂiÂty sheet for young visÂiÂtors that notes that operÂatÂing a “human treadÂmill” was both gruÂelÂing and danÂgerÂous:
PhilosoÂpher John StuÂart Mill wrote that they were “unequalled in the modÂern annals of legalÂized torÂture.”
Good call, then, on the part of GuĂ©delon’s leadÂerÂship to allow a few anachroÂnisms in the name of safeÂty.
GuĂ©delon’s treadÂmill cranes, includÂing a douÂble drum modÂel that pivÂots 360Âş to deposit loads of up to 1000 lbs wherÂevÂer the stoneÂmaÂsons have need of them, have been outÂfitÂted with brakes. The walkÂers inside the woodÂen wheels wear hard hats, as are the overÂseer and those monÂiÂtorÂing the brakes and the craÂdle holdÂing the stones.
The onsite workÂer-eduÂcaÂtors may be garbed in periÂod-approÂpriÂate loose-fitÂting natÂurÂal fibers, but rest assured that their toes are steel-reinÂforced.
Château de GuĂ©deÂlon guide Sarah PreÂston explains the reaÂsonÂing:
ObviÂousÂly, we’re not tryÂing to disÂcovÂer how many peoÂple were killed or injured in the 13th-cenÂtuÂry.
Learn more about Château de GuĂ©deÂlon, includÂing how you can arrange a visÂit, here.
Explore the hisÂtoÂry of treadÂmill cranes here.
And see how the Château de GuĂ©deÂlon has housed UkrainÂian refugees here.
RelatÂed ConÂtent
The Medieval City Plan GenÂerÂaÂtor: A Fun Way to CreÂate Your Own ImagÂiÂnary Medieval Cities
A Medieval Book That Opens Six DifÂferÂent Ways, RevealÂing Six DifÂferÂent Books in One
- Ayun HalÂlÂiÂday is the Chief PriÂmaÂtolÂoÂgist of the East VilÂlage Inky zine and author, most recentÂly, of CreÂative, Not Famous: The Small PotaÂto ManÂiÂfesto. FolÂlow her @AyunHalliday.














