(_β_) A _further_ aspect in decorative work is bound up in the same way with the romantic type of art in general. The romantic has on the one hand for its principle Ideality, the return of the Ideal to itself. On the other the Ideal has to reappear in that which is external, and then withdraw itself into itself from the same. In architecture it is the sensuous, material mass in relations of Space, in which the most Ideal essence itself is, so far as that is possible, to be presented in visible shape. With a material such as this to deal with there is no other alternative possible than that of not suffering this material to assert itself with power in its materiality, but to break up and dismember its masses in every direction, and to wrest from the same the appearance of its immediate coherence and self-subsistency. In this connection the ornamentation, more particularly that of the exterior, which has not to display the fact of enclosure as such, assumes the character of a net-work[108] carried in every direction, or rather interwoven over the surfaces; and we have no example of an architecture which, taking into account the enormous and heavily weighted masses of its stone and their secure coherence, nevertheless has preserved to such a complete extent the character of lightness and delicacy. (_γ_) We have only further and _thirdly_ to remark with reference to such embellishments that in addition to pointed arches, piers, and circles, the forms once more call to mind those of the real organic world. The fretwork and working out of the mass already carries a suggestion of this. Regarded in more detail, however, we actually find leaves, rosettes of flowers, and, in entwining work of an arabesque character, human figures and those of animals partly realistically and partly fantastically linked together; the romantic imagination, in short, even in architecture, displays its wealth of imaginative creation, and its power to unite in unexpected ways heterogeneous elements, although from another point of view, at any rate during the period of the purest type of Gothic architecture, even in the matter of ornament, as, for example, in the pointed arches of the windows, we may observe a decisive return to simple forms. 3. DIFFERENT TYPES OF BUILDING IN ROMANTIC ARCHITECTURE The last point on which I have a few observations to make is that of the principal types followed by romantic architecture in its course of development at different periods. I must, however, add the premise that in this work no attempt can be made to supply a history of this branch of the art.