In an age when every noble's house was a castle, and when every castle was erected in order to dominate, as well as to defend, the town and the district in which it stood, the Tower of London was erected. The builder of the White Tower was William the Conqueror, who gave the City its Charter but had no intention of giving up his own sovereignty; the architect, as has been already said, was one Gundulph, Bishop of Rochester. Part of the City wall was pulled down to make room for it, and it was intended at once for the King's Palace, the King's Castle, and the King's Prison. It was also the key of London—who held the Tower, held the City.

William Rufus built a wall round the Tower so as to separate it entirely from the City and to prevent the danger of a hasty rising of the people: with the same object he gave it a water gate.

A hundred years later, while Richard Coeur de Lion was on his Crusade, the moat was constructed. Henry III. and his son Edward I. added to the outer walls and strengthened them.

There is a plan of the Tower made from a survey of the year 1597 and published by the Society of Antiquaries. A study of the plan should be made before visiting the place. Remark first of all that the fortress has three entrances only: one at the S.W. angle to the City; one to the river now called Traitors' Gate; and one on the S.E. angle called the Irongate: that it is surrounded by a broad and deep moat which could be filled at every high tide: that from the moat rises a battlemented wall, and that within this first wall is another, flanked with protecting towers; that the City entrance is most jealously guarded by a strong gate first: then by a narrow way passing under a tower: then over a bridge. In all mediÆval castles the first thought was to make it impossible to carry the place by a rush. If we would restore the Tower of Queen Elizabeth to the Tower of Edward III. we must abolish all those buildings which stand on the north and east sides, with those called 'Lieutenants' Lodgings' on the south. The space on the north side of the Keep was the exercising ground: stables there must have been somewhere in this great area; the men at arms would live in the smaller towers. If you will study this plan carefully, you will understand the general arrangement of a mediÆval castle.

In the sixteenth century the place was no longer regarded as a fortress for the defence or the domination of the City. But the old forms were kept up: nobody was admitted who carried arms: the guard kept the gate: a garrison was maintained. Within, there was an armoury, the beginning of the splendid collection which is now shown: there was a Mint for the coining of money: there were collections of tapestry, saddles, bed furniture and robes belonging to the Crown: here were kept the Crown and sceptre and insignia: here was the Royal menagerie. Here were the rooms reserved for state criminals. It was no longer the Royal Palace but the sovereign sometimes occupied the Tower. James the First was here, for instance, in 1604.

Near the outer gate where is now the Refreshment Room were kept the King's lions. Henry I. began this menagerie which was continued until the year 1834. At the entrance of the fortress is the Bell Tower where Queen Elizabeth was once confined. The Water Gate called Traitors' Gate is under St. Thomas's Tower. The Beauchamp Tower has been the prison of, among others, Queen Anne Boleyn and Lady Jane Grey. In the Great White Tower Richard II. abdicated in favour of Henry IV. In the vaults are dungeons, once the prison of Guy Fawkes. In the Chapel the newly made Knights of the Bath watched their armour all night long. The collection of arms contains examples of weapons and armour of every age. In the Church of St. Peter ad Vincula you will find the graves of the unfortunate Princes, Queens, and nobles who have been executed for State offences. Nothing, except the Royal tombs of Westminster, so much helps to prove the reality of History, as this collection of graves and slabs and tablets in this little church. And here were kept the Crown jewels about which many a chapter might be written.

But to study the Tower of London one must visit it with the History of England in hand. Hither were brought all the State prisoners: here they were confined: here they were executed. Every tower, every stone reminds one of sufferers and criminals and traitors and innocent victims. Do not, however, forget that this Tower was built for the restriction of the liberties of the people. That purpose has been defeated. The liberties have grown beyond what could ever have been hoped while the privileges of the Crown, which this Tower was built to protect and to enlarge, have been restricted beyond the greatest fears of the mediÆval kings.