Next to the Bowyer Tower stands the Brick Tower, but it has been modernised. In shape this tower resembles a horse shoe; it is 40 feet in diameter. Between this tower and the Martin Tower the curtain wall extends some 60 feet, the sally-port stairs being passed between the two towers. As has been the general fate of most of the towers, the Martin Tower is externally entirely modern, whilst the interior has been casemated. At one time the Regalia was kept here, having been brought in 1644 from their former resting-place in a small building on the south side, and close to, the White Tower, called the Jewel House, where they had been kept, when not in pawn, from the time of Henry III. In the reign of Edward III. these jewels are referred to as being in “la Tour Blanche,” and in the same reign there is also a reference to the “Tresorie deinz la haute Toure de Londres.” It was from the Martin Tower that Blood attempted to steal the Regalia. The Martin Tower forms the north-east angle of the Inner Ward, and its basement floor, where the Crown jewels were formerly kept, now serves as a kitchen for the warder and his family, who occupy the tower. The most ancient part of the Martin Tower dates from the reign of Henry III., but Sir Christopher Wren, who spoilt the ancient appearance of many parts of the Tower, played especial havoc here. The old windows were removed and replaced by ugly stone-faced ones, which was also done in the White Tower, where, with scarcely one exception, the original Norman windows have been destroyed and Wren’s incongruities substituted for them. Placed on the ground at the base of the Martin Tower is a handsome architrave of stone, in alto-relievo, representing the Royal coat-of-arms in the time of William III., blended with military trophies such as helmets, kettledrums, and cannon— “The shrill trump, the spirit-stirring drum, the ear-piercing fife, The royal banner, and all quality, Pride, pomp and circumstance of glorious war.” This is one of Grinling Gibbons’s most spirited designs, graceful in its lines, sharp and refined in its moulding. This sculpture is all that remains of the great Store House, built in the reign of William III. and destroyed by fire in 1841.