The Romans used these arcades with all the 3 orders, frequently one over the other, and tried various expedients to harmonise the construction with the ornamentation, but without much effect. They seem always to have felt the discordance as a blemish, and at last got rid of it, but whether they did so in the best way is not quite clear. The most obvious mode of effecting this would no doubt have been by omitting the pillars altogether, bending the architrave, as is usually done, round the arch, and then inserting the frieze and cornices into the wall, using them as a string-course. A slight degree of practice would soon have enabled them—by panelling the pier, cutting off its angles, or some such expedient—to have obtained the degree of lightness or of ornament they required, and so really to have invented a new order. This, however, was not the course that the Romans pursued. What they did was to remove the pier altogether, and to substitute for it the pillar taken down from its pedestal. This of course was not effected at once, but was the result of many trials and expedients. One of the earliest of these is observed in the Ionic Temple of Concord before alluded to, in which a concealed arch is thrown from the head of each pillar, but above the entablature, so as to take the whole weight of the superstructure from off the cornice between the pillars. When once this was done it was perceived that so deep an entablature was no longer required, and that it might be either wholly omitted, as was sometimes done in the centre intercolumniation, or very much reduced. There is an old temple at Talavera in Spain, which is a good example of the former expedient; and the Roman gateway at Damascus is a remarkable instance of the latter. There the architrave, frieze and cornice are carried across in the form of an arch from pier to pier, thus constituting a new feature in architectural design. [Illustration: 185. View in Courtyard of Palace at Spalato] In Diocletian’s reign we find all these changes already introduced into domestic architecture, as shown in Woodcut No. 185, representing the great court of his palace at Spalato, where, at one end, the entablature is bent into the form of an arch over the central intercolumniation, while on each side of the court the arches spring directly from the capitals of the columns.