Vases and placques signed by the artists who have painted them. Such unique specimens of personal work are never reproduced. (A list of artists, with facsimile reproductions of their signatures, will be found at the end of this chapter.) II. _General Art Objects._ Vases, placques, bibelots, and ornamental subjects. These are designed with a view to general production, and this practice has originated since 1893. [Illustration: PLACQUE. With geese and landscape painted in underglaze colours. Signed C. F. Liisberg.] In this class may be included the collection of Commemorative Placques designed by Arnold Krog. The number struck of these is limited, and they are never repeated after the occasion for which they were made (see p. 243). More strictly utilitarian ware is represented by the continuous output of the blue-and-white fluted service, to which new forms are constantly being added. III. _Figure Subjects._ Peasants, children, and animal life--quadrupeds, birds, and fish--all modelled directly from nature. IV. _Vases and Modelled Subjects with Coloured or Crystallized Glazes._ This style was commenced at Copenhagen as early as 1886, and is described in detail, Chapter X. =Overglaze Painted Porcelain= Revival of porcelain in the style of the Juliane Marie period, modelled and decorated from old and rare examples. This is the latest phase of development. * * * * * In tabulated form some conception may be formed as to the classes into which the work of the modern Renaissance may be divided. Something must be said about the immediate causes which directed the line of progression and advancement in the course it has taken. The principles of decoration especially applying to porcelain, smooth, white, and hard, such as this, have been realized to the full by Arnold Krog, the art director of the factory. The uttermost developments of the underglaze painting are governed by the axiom that such a fine body as that of the Copenhagen porcelain is instantly destroyed by being covered with colours or with gilding. The old Danish mussel-blue painted underglaze dinner ware is the skeleton upon which the fabric of the modern Renaissance movement has been built.