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By Hugh Schofield
BBC News, Paris The chateau de Guedelon The chateau was started in 1998 in a
project to build a castle from scratch
Deep in the forests of central France, an unusual architectural experiment is
half-way to completion, as a team of masons replicates in painstaking detail
the construction of an entire medieval castle.
The Chateau de Guedelon was started in 1998, after local landowner Michel
Guyot wondered whether it would be possible to build a castle from scratch,
using only contemporary tools and materials.
Today, the walls are rising gradually from the red Burgundy clay. The great
hall is almost finished, with only part of the roof remaining, while the main
tower edges past the 15m (50ft) mark.
Builders use sandstone quarried from the very ground from which the castle is
emerging.
Modern cement did not exist in the 13th Century, so mortar is made from slaked
lime and sand. For tools they have basic ironware.
Eccentric pipe dream
In woods surrounding the castle, craftsmen ply all the trades required for so
monumental an endeavour. Stone-cutters and carpenters fashion the raw
materials. A blacksmith forges the nails. Ropes, baskets and roof-tiles are all
made on site.
"The rule is that only what we know from documents that existed at the time is
allowed," says Sarah Preston, an English guide.
BBC file image of craftsman at work Only contemporary tools and materials are
used in the construction
What started out as an eccentric pipe dream is now an established enterprise,
drawing in tens of thousands of visitors from around Europe every year.
And Guedelon is also highly respected in the academic world. Experts are
fascinated by what the experiment can teach about medieval building methods.
One example concerns lime kilns, used for making the mortar. Archaeologists had
often wondered why they found traces of two separate kilns at construction
sites.
Experience at Guedelon showed that, in a day's work, builders often needed to
top up the mortar brought in from the main kiln with small amounts made close
at hand. Hence the small second kiln actually inside the castle.
The discolouring of lime-based mortar is another revelation. Within one or two
years of being laid, Guedelon's walls are already showing streaks of unsightly
white where the lime is leaching.
Archaeologists think this is a clue to why medieval castles were very quickly
plastered and painted: it was to hide the mess.
Mr Guyot, who owns the nearby castle of St Fargeau, teamed up with
businesswoman Maryline Martin to launch the project in 1996. Part of the
rationale was simply to provide employment for local people.
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How to build a medieval castle
The Guedelon site was chosen because it contained all the necessary materials:
plentiful oak from the forests, as well as clay and water. Stone from the
quarry had actually been used in the building of real-life medieval chateaux.
'Lacking soul'
The castle's design is based on a style made popular by French King
Philippe-Auguste in the early 13th Century.
An architectural team approves each year's building plans, after a master mason
has sketched details from dozens of contemporary castles. Again, nothing that
is not referenced in equivalent 13th Century buildings is permitted.
"Funnily enough, we found that even though we knew we were being accurate,
somehow the castle lacked soul. So we invented a character - the owner - who
would have likes and dislikes, wanting this and not wanting that," says Ms
Preston.
BBC file pic of craftsman at work Metalwork is forged on site in a project
aiming for historical accuracy
Seigneur Guilbert is a middle-ranking feudal lord, who has been granted the
right to build his castle because he sided with the crown during a baronial
rebellion in 1226.
The rebellion - at the accession of the 12-year-old Louis IX (later Saint
Louis) - did actually take place, and was suppressed by his mother Blanche de
Castile.
In the annals of Guedelon, construction started in 1228. Each year that passes
is a year in historical time too, so we are now in 1240. Completion is due
around 1253 - or 2023 in today's calendar.
What happens when the castle is finally finished, no-one is really sure. One
option is to start extending.
"Remember, medieval castles were often works in progress. In the 15th Century
they might have added new bits with different architectural styles, and then
again and again," says Preston. "So we could keep going for ever."