Other Christian Crusaders pushed north and east. The warlike Normans travelled widely, building castles as they went. As William was crossing the Channel, his countrymen travelled also to southern Italy, first, it seems, as religious tourists, then as land-hungry warriors. Men like William de Hauteville, who won the nickname ‘Iron Arm’, arrived as adventurers and died as sovereigns. His half-brother Robert invaded Sicily and built San Marco d’Alunzio, the first Norman castle there, before capturing Rome itself.
Margat Castle’s black walls contrast starkly with the white limestone of Krak. Built of hard basalt, it was one of the Knights Hospitallers’ most important strongholds
In November 1095 Pope Urban II proposed a military expedition to ‘recover’ Jerusalem, the holiest site in the Christian faith – a call which unleashed wars of terrible ferocity across Eastern Europe and the Middle East. Kingdoms and principalities were carved out, besieged, captured and recaptured. In what was already a heavily-fortified landscape, the Christians built the most perfect castles in the world: Kerak, Krak des Chevaliers, Marqab and Saone to name a few (see Chapter 3). To visit them today is a truly awesome experience. At Saone, now known as Salah Ed-Din’s (Saladin’s) Castle after the Egyptian military genius who eventually captured it, there is a 30-metre-deep ditch cut into the rock either by the Crusaders or their predecessors, guarded by a monumental Crusader bastion with walls 5 metres thick. As I approached these castles, panting in the heat, the walls seemed to grow ever more formidable. I was overwhelmed by the lengths to which the Crusaders went to protect their conquered territory. But I also could not help thinking that these vast edifices bear witness to the fury and vigour with which the Muslims tried to drive them back into the sea.
With a supply chain stretching over thousands of miles, a hostile unfamiliar climate and a dizzying array of enemies close by, these castles were needed as ‘force multipliers’ more than anywhere else. Despite the utterly different terrain, they were doing the same job as castles everywhere else I had visited. A group of armed outsiders, invaders, surrounded by hostile territory, sought refuge and strength behind stone walls, gatehouses and towers. The process was universal. I saw the same thing in Syria that I had in Wales, France and Spain.
In the West, war and anarchy continued to promote the building of castles. When King Henry I of England dared to die without a male heir, despite having fathered over twenty acknowledged illegitimate children, England was again plunged into chaos. Camps formed around his daughter Matilda and her cousin Stephen. War followed. Local lords looked to their own defence. Fortifications were raised. ‘Christ and all his saints were asleep,’ a chronicler observed, and ‘the land was filled with castles’.
Castles appear to have made civil war all the more intractable. Neither side had the resources to besiege their enemy’s castles one after the other and so two competing weak regimes were eclipsed in the provinces by local powerbases. For the first time in British history, sieges really came to the fore. During a siege of Newbury Castle, Stephen demanded the surrender of the garrison and said if they held out he would hang the son of their defiant leader in broad view. The warlord defied this threat: ‘I still have the hammer and the anvil,’ he declared, ‘with which to forge still more and better sons!’ Fortunately for the child, and fortunately for England, Stephen did not carry out his threat. The boy, William, would grow up to become the supreme English knight of medieval history, the Marshal of England and saviour of the kingdom at its lowest ebb. Matilda herself was no less lucky if folklore is to be believed. Twice she escaped from being besieged, once across the frozen Thames in winter in a white cloak, and once as a corpse being taken out for burial.
The so-called ‘Anarchy’ came to an end when Matilda’s son Henry Plantagenet invaded England from France in 1153, and forced the ageing Stephen to negotiate. The death of Stephen’s heir opened the door to a deal and Stephen named Henry as his successor. Through his marriage to Eleanor of Aquitaine, Henry II would control a vast empire from the borders of Scotland to the Pyrenees. To secure it he tore down troublesome castles and built mighty royal ones, like that at Dover which rose above the white cliffs and which would endure the attacks of Prince Louis, another claimant to the throne of England (see Chapter 1).
Henry spent vast amounts of money on his royal castles. It was not unusual for half the annual royal budget to be spent either on building new castles or repairing old ones. An eyewitness observed of the building work at the Tower of London that ‘with so many smiths, carpenters and other workmen, working so vehemently with bustle and noise […] a man could hardly hear the one next to him speak’. Under Henry we know that an unskilled labourer moving earth and stones on a site like this would have been paid a penny a day. For the King these castles were about prestige as much as security. Dover was a glittering adornment to the channel coast, visible to ships passing through the narrows, a symbol of Henry’s massive empire. It was also one of many seats of government. Medieval kingship was peripatetic: kings and courts moved constantly. Since rule was personal it was wise for a king to show himself to his subjects, dispense justice and redress grievance as widely as possible. But logistics also played a part. The King and his court soon consumed all the supplies in one castle and it was easier to move to the food than to bring the food to them. Henry would have recognized the description of medieval kingship offered by his namesake, Henry IV, King of France: ‘I rule with my weapon in my hand and my arse in the saddle.’ His royal castles really were residences for him and his court on these huge progresses and they were appointed with all the finery demanded by the royal court.
The castles also served their most obvious purpose. When Scottish King William the Lion invaded England in 1173, he marched on Newcastle but did not even attempt to besiege the castle because he lacked the necessary, cumbersome siege engines. When he tried to besiege Alnwick, he was captured by English knights and eventually forced to sign a humiliating submission to the English Crown. Henry’s castles defended his northern frontier while he focussed his attention on unrest in other parts of his empire.
That empire grew wider: Ireland was sucked into the orbit of the Plantagenet Crown when Henry himself invaded and captured Dublin, and received the submission of its bishops and kings. Castles like Kilkenny, Killeen and Dunsany were planted by Henry’s subordinates, and his son, John, started work on Dublin Castle, a building that was to remain the seat of English and then British rule in Ireland until 1922. Ireland remained largely beyond the writ of English government, however, as other targets distracted English kings. It was never fully annexed, the chronicler Gerald Cambrensis lamented, because of the failure to build castles ‘from sea to sea’.
Henry’s sons utterly failed to guard their vast inheritance. Richard was a warrior, but no ruler, and John may have been