Siege of Cambridge Castle (1643)
Who Fought
History & Significance
Cambridge Castle, locally also known as Castle Mound, is in Cambridge, Cambridgeshire, England. Built after the Norman Conquest of England in 1066 to control the strategically important route to the north of England, it played a role in the conflicts of the Anarchy and the First and Second Barons' Wars. Hugely expanded by Edward I, the castle then fell rapidly into disuse in the late medieval era, its stonework robbed for building purposes in the surrounding colleges. Cambridge Castle was refortified during the English Civil War but once again fell into disuse, used primarily as the county jail. The castle jail was finally demolished in 1842, with a new prison built in the castle bailey. This prison was demolished in 1932, replaced with the modern Shire Hall, and only the castle motte and limited earthworks still stand. The site is open to the public daily and offers views over the historic buildings of the city.
Cambridge Castle was one of three castles built across the east of England in late 1068 by William the Conqueror in the aftermath of his northern campaign to capture York. Cambridge, or Grantabridge as it was then known, was on the old Roman route from London to York (Ermine Street) and was both strategically significant and at risk of rebellion. The initial building work was conducted by Picot, the high sheriff, who later founded a priory beside the castle. The castle was built in a motte and bailey design, within the existing town, and 18 or 27 houses had to be destroyed to make space for it.
The castle was held by the Norman kings until the civil war of the Anarchy broke out in 1139. Castles played a key role in the conflict between the Empress Matilda and King Stephen, and in 1143 Geoffrey de Mandeville, a supporter of the Empress, attacked Cambridge; the town was raided and the castle temporarily captured. Stephen responded with a counter-attack, forcing Geoffrey to retreat into the Fens and retaking the castle. Cambridge Castle remained exposed, however, and Stephen decided to build a supporting fortification at Burwell to provide additional protection. Geoffrey died attacking Burwell Castle the following year, leaving Cambridge Castle secure.
Under Henry II the castle was adequately maintained, but little additional work was undertaken to improve it. A castle-guard system was established, under which lands around Cambridge were granted to local lords on the condition that they provide guard forces for the castle, and the castle was primarily used to hold the sheriff's court and records. King John expanded the castle in the years before the First Barons' War of 1215 to 1217, but this work was concentrated on constructing a new hall and chamber, at the cost of £200. During the war, the rebel barons, supported by Prince Louis of France, captured much of eastern England; Cambridge Castle fell in 1216. The castle was returned to royal control after the war, but Henry III only conducted basic maintenance of the fortification. Cambridge was attacked again during the Second Barons' War in 1266. This time the town and castle held long enough to be relieved by Henry's forces, but the king reinforced the city defences with a large ditch, later known as King's Ditch.
The ground they fought on
The site of Siege of Cambridge Castle (1643) lies on Gault Formation And Upper Greensand Formation (Undifferentiated), bedrock that formed in the Cenomanian. The rock here is mudstone, sandstone and limestone.
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