The wall has a sufficient height, and is furnished with battlements and turrets, built in the modern style, for its defense. It has a circuit of about one legua, which can be made entirely on top. It has many broad steps of the same hewn stone, at intervals inside. There are three principal city gates on the land side, and many other posterns opening at convenient places on the river and beach, for the service of the city. Each and all of them are locked before nightfall by the ordinary patrols. These carry the keys to the guard-room of the royal buildings. In the morning when day comes, the patrols return with the keys and open the city. [169] The royal arsenals front on the Plaza de armas. In them are kept and guarded all the supplies of ammunition, food, rigging, iron, copper, lead, artillery, arquebuses, and other things belonging to the royal estate. They have their own officers and workmen, and are placed in charge of the royal officials. Near these arsenals is located the powder-house, with its master, workmen, and convicts, where powder is generally ground in thirty mortars, and that which is spoiled is refined. [170] The building for the founding of artillery is located on a suitable site in another part of the city. It has its molds, ovens, and tools, founders, and workmen who work it. [171] The royal buildings are very beautiful and sightly, and contain many rooms. They have many windows opening toward the sea and the Plaza de armas. They are all built of stone and have two courts, with upper and lower galleries raised on stout pillars. The governor and president lives inside with his family. There is a hall for the royal Audiencia, which is very large and stately; also a separate chapel, a room for the royal seal, [172] and offices for the scriveners of the Audiencia, and the government. There are also other apartments for the royal treasury and the administration of the royal officials, while a large porch opens on the street with two principal doors, where the guardroom is located. There is one company of regular arquebusiers, who come in daily with their banners to stand guard. Opposite, on the other side of the street, is another edifice for the royal treasury and those in charge of it. [173] The houses of the cabildo, located on the square, are built of stone. They are very sightly and have handsome halls. On the ground floor is the prison, and the court of the alcaldes-in-ordinary. [174] On the same square is situated the cathedral church. It is built of hewn stone, and has three naves, and its main chapel, and choir, with high and low seats. The choir is shut in by railings, and has its organ, missal-stands, and other necessary things. The cathedral has also its sacristan [175] and his apartments and offices.