The White Tower, which has walls fourteen feet thick in some parts, covers a space one hundred and sixteen by ninety-six feet, and is ninety-two feet high, with turrets at the angles. Each floor is divided into three rooms, with stone partitions seven feet thick. On the second floor is St. John's Chapel, and on the third the council-chamber of the early kings, with a dark, massive timber roof; in this chamber Richard II. resigned his crown; it is now filled with a vast collection of arms. The Salt Tower, which is at an angle of the enclosure, was formerly a prison; and in another part of the grounds is the Jewel House, where the crown jewels are kept; they are in a glass case, protected by an iron cage, and the house was built for them in 1842. Queen Victoria's state crown, made in 1838, after her coronation, is the chief. It consists of diamonds, pearls, sapphires, rubies, and emeralds set in silver and gold, and has a crimson velvet cap with carmine border, lined with white silk. It contains the famous ruby given to Edward the Black Prince by the King of Castile, and which is surrounded by diamonds forming a Maltese cross. The jewels in this crown are one large ruby, one large sapphire, sixteen other sapphires, eleven emeralds, four rubies, one thousand three hundred and sixty-three brilliant diamonds, one thousand two hundred and seventy-three rose diamonds, one hundred and forty-seven table diamonds, and two hundred and seventy-seven pearls. Among the other crowns is St. Edward's crown, of gold embellished with diamonds, used at all coronations, when it is placed upon the sovereign's head by the Archbishop of Canterbury. This crown was stolen from the Tower by Blood in 1761. There are also the Prince of Wales' crown, the queen's crown, the queen's diadem, St. Edward's Staff, four feet seven inches long, made of beaten gold and surmounted by an orb said to contain part of the true cross, and carried before the sovereign at coronation; the royal sceptre (surmounted by a cross), which the archbishop places in the sovereign's right hand at coronation; the rod of equity (surmounted by a dove), which he places in the left hand; several other sceptres; the pointless sword of Mercy, the swords of Justice, and the sacred vessels used at coronation. Here is also the famous Koh-i-noor diamond, the "Mountain of Light," which was taken at Lahore in India. The ancient Martin or Jewel Tower, where Anne Boleyn was imprisoned, is near by; the barracks are on the north side of the Tower, and behind them are the Brick and Bowyer Towers, in the former of which Lady Jane Grey was imprisoned, and in the latter the Duke of Clarence was drowned; but only the basements of the old towers remain. The Tower Chapel, or church of St. Peter's, was used for the cemetery of the distinguished prisoners who were beheaded there, and in its little graveyard lie scores of headless corpses, as well as the remains of several constables of the Tower.