The great centres which in the 16th century had produced such splendid works of art had almost completely ceased. No great silversmiths remained at Valladolid, Leon, Toledo, or Seville. The only localities which have preserved even to the present day the traditional forms of these ornaments are Salamanca, Cordova, Astorga, and Santiago. Madrid absorbed from the middle of the 17th century the whole of this industry. In Larruga's "Memorias," Vol. IV., will be found every detail given on this subject. Several important establishments for the object of making silver work on a large scale were founded at Madrid, the most important being that of Tomas de Buenafuente, which passed after to Francisco Novi. Two Frenchmen called Isaac and Miguel Naudin established a manufactory in 1772. In each the greater part of the work was machine made. Others were founded to cut and polish precious stones, and mount paste stones. This was done with great skill by Antonio Martinez in 1778, in a building fitted up for the purpose, which still exists opposite the Botanical Garden of Madrid. Martinez was pensioned by Charles III. in Paris and London to study the improvements in this industry. The principal object of the manufactory was to teach the technical proceedings required in order to extend this industry in the country, and supply a school in which machinery, models, drawings, &c., were to be met with. Pupils of both sexes were admitted; machinery was made in the workshops, and Martinez undertook to teach the manufacture of gold, doublé, or steel trinkets, with or without enamel or stones. Sword-hilts, buckles, snuff-boxes, needle-cases, handles for sticks, brooches, necklaces, orders, and other different objects, were made either of open work or enamelled gold. Inkstands, dishes, dinner services, chocolate stands, cruets, knives and forks, were made of silver in different styles, generally imitating the English manner. [Consult Larruga, "Memorias Politicas y Economicas." Madrid, 1789. Vol. IV., p. 116.] The results obtained by the manufactory of Martinez were most satisfactory; a large number of apprentices were taught there; but their work was completely French in character; the manner and style of the Spanish school of silversmiths was completely forgotten.