This castle is the principal house in this principal city, belonging to the crown of Sweden; it is a large castle, more for conveniency of a Court than for stateliness of structure. It is almost four-square, one way longer than the other, all of brick, plastered over to make it seem as if it were of freestone, whereof there is not much in these parts fit for building; the entry into the castle is upon the north quarter; the south and east side is of fair building, four stories high, the windows not large. On the west of the quadrangle is the chapel, about a hundred and thirty feet in length, with the breadth proportionable; it is divided into three arches, upon two ranges of pillars of marble of this country, of divers colours, most in red streaks, handsome and polished. On the windows and walls are several pictures and images, after the manner of the Lutheran churches. The rooms in the castle are many, some of them large enough for the state of a Court, and most of those are two stories high, after the use of this country. The situation of the castle is pleasant and noble, by the side of the great water, upon which part of it is built, and the other part upon the island where it stands; and though of itself it be not of great strength, yet the situation, prospect of the waters, ships, vessels, islands, and buildings, on the one side, and of the country to the mountains on the other side, give it the repute of a princely palace. In the castle Whitelocke was carried up to a room, a magazine, where were a very great number of muskets, pikes, swords, and other foot arms, excellent good, made in this country, of their own iron and steel, and kept exceeding clean, bright, and well fixed, and were said to be sufficient to arm ten thousand men completely. On the other side of the court they brought him to another room, where was a magazine of horse-arms, cuirassiers, with pistols, bright, well kept, and of an excellent make; there were also more foot-arms: in all, in this magazine, two thousand horse-arms, and five thousand foot-arms; and in the other magazine, ten thousand foot-arms. There were likewise colours, ensigns, and standards, taken from their enemies, to the number of about eight hundred; among them one taken by King Gustavus in person, and another, which Wrangel showed, that he had taken from the Duke of Saxony. This city is doubtless as well provided of arms and all sorts of ammunition for war as any place in these parts of Europe, here being, besides the Queen's stores in the public Arsenal, arms sufficient for fifty thousand men.