According to the Domesday Book of 1086 Chepstow was one of the castles built by Earl William Fitz Osbern
(d.1071). What form the castle took in his lifetime is open to
debate. However it is possible that he was responsible for
building the great hall block seen above. This rectangular hall
keep is over one hundred feet long by forty feet deep. There were
probably also contemporary curtain walls forming baileys to east and
west. The original tower was two storeys high above a half
basement, with pilaster buttresses and an entrance at first floor level
to the south. From within this a stairway, built into the thickness of the
wall, ran up to the lost battlements. Much Roman tile is used in the fabric of the structure and
this was certainly the first masonry built on the site. Another
possibility is that this hall was built by King Henry I
to meet the princes of Wales at, but this theory is unprovable. What is
certain is that the hall keep has parallels with nearby castle keeps,
such as Monmouth, Goodrich and possibly St Briavels.
King Henry I (d.1135) granted Chepstow castle to the Clare
family whose male line died in 1176. The most famous member of
the family was Earl Richard Clare of Chepstow. He, like his father,
Gilbert, is currently and wrongly known by the anachronistic nickname, Strongbow. In 1139 Earl Gilbert had
married his sister, Rose Clare, to Baderon Monmouth (d.1170) and in some manner
obtained control of Goodrich castle.
On Earl Richard's death the castle passed through royal custody
to the great Earl William Marshall from 1189 until his death in 1219.
In 1202 he reunited the honour with Goodrich castle.
William and his sons are said to be responsible for much of the
current masonry at the castle, but as ever with such claims there is no
proof. Traditionally Fitz Osbern is supposed to have built the
great hall keep which still dominates the castle. Tradition also
has it that the castle then remained unaltered until 1189, when William
Marshal brought it up to date as a castle of the first rank. This
‘history' is based on the supposition that both Williams were
great men and therefore must have both built great castles.
Beyond the Domesday Book entry there is no evidence at all that either
man did anything at Striguil and the knowledge that William Fitz Osbern
had so little time to build the keep must throw even the interpretation
of this Domesday evidence into question. Further, why would
William Marshall spend a fortune on a rather out of the way castle,
even if it was the head of his second and least powerful earldom?
In reality we have little idea of the dates of the castle masonry,
other than nothing major was built at the castle between 1176 and 1189
when the fortress was in royal hands. Further,
dendrochronological dating shows that the castle outer gates were not
constructed until soon after 1151. This would suggest that the
bulk of the castle was completed under the Clare earls of Striguil
(1138-76), rather than the later Earl Marshalls of Pembroke
The castle boasts a twin towered gatehouse, as seen below, which held
these wooden gates, the oldest surviving in
the country. If the gates do date back to the Clare tenure, then
it suggests the surrounding gateway did too. That said the
seen today is a composite affair of many ages.
At the opposite, northern end, of the castle is another powerful
gatehouse and barbican which is also of several building phases.
Within the rear of this gatehouse is a window similar to those
found in the keep at Goodrich castle. Both these fortresses were held by the Clares and then the Crown in the twelfth century.
Within the lower ward are the domestic
buildings of the Bigods and the powerful Marten Tower, which the
prison of the regicide, Henry Marten.
Paul Martin Remfry