The walls of Mykenæ are not of equally gigantic masonry, but are fully as old, and are especially interesting because of the city having been a complete ruin in the earliest historical times. Besides casemate galleries in the walls, there are in Mykenæ a number of highly important gateways and portals; those of the fortifications at Tiryns were entirely destroyed, an inclined plane leading to the eastern side of the acropolis is there alone to be recognized as an approach.
The doors were naturally of greater technical perfection than the long line of bulwarks; having been created for both admittance and defence, they required a certain constructive calculation, and permitted the employment of more exterior ornament. The simplest possible form of a gateway is the combination of three stones—the two jambs and the lintel—observable in two examples at Mykenæ. (Figs. 126 and 127.) Such a construction had the disadvantage that the upright blocks could not be joined to the wall, and that the lintel, which necessarily lay clear for a considerable length, could not immediately receive the massive continuation of the masonry above it. Notwithstanding the convergence of the jambs upon the great gate of Mykenæ, the beam has a length of 4.6 m., with a span of 3.05 m.; the bottom of the door being 3.2 m. wide, and its height 3.25 m. A relieving gable was consequently constructed, similar to that common in Egypt during the age of the Pyramids, and to that described in the consideration of the Tholos of Atreus. A triangular opening remained above the lintel, by which the efficacy of the wall as a fortification was considerably impaired. The orifice was closed by one or two slabs, which did not press heavily upon the lintel; but they could not have been sufficient to escape fracture by heavy missiles, or to resist the blows of a battering-ram. The attack was therefore diverted from this vulnerable point by moral means. The panel received a certain consecration by some protecting sacred symbol being carved upon it—such, for instance, as a Gorgon’s head—a recourse which was effective in times when the slightest desecration of a divine emblem was deemed more impious than the bloodiest deed of human violence. Such a carving has been preserved over the gateway of Mykenæ, which has received its name from the lions represented upon it. As a work of sculpture, it will be considered below. The column between the animals has, however, a bearing upon the architectural forms of the epoch. It is the same shaft, diminishing from summit to base, which has been noticed upon the portal front of the Tholos of Atreus. A second gate of Mykenæ resembled the Gate of ºthe Lions, but was smaller and simpler. (Fig. 127.)
The form of three blocks appears to have been soon changed, the wall itself serving in place of an especial jamb. The span of the lintel was decreased by two or four boldly projecting blocks as brackets. Examples of this development are offered by portals of Samos and Phigalia. (Figs. 128 and 129.) But in the same measure as the danger from the great span of the lintel was diminished, that of the brackets being pressed downward and disjointed was increased. A third manner of covering the opening, by stones leaned against each other at an angle, was a still further advance. (Fig. 130.) When the side thrust could be well borne—and for this the walls were always sufficient—such a gable could support any pressure that could possibly be imposed, while allowing a great breadth of passage. Finally, a triangular construction could be obtained by a gradual projection of horizontal stones, laid as they had been in so many instances for the relief of a lintel beneath them. This construction occurs in two varieties, differing in appearance, though not in principle: the projection of the horizontal courses of stone either began directly from the ground (Fig. 130), as has been noticed in the Tholos of Atreus (Fig. 122), or commenced at some height, the jambs being carried up vertically. (Fig. 132.) In both these varieties the line of the gable frequently appears concavely curved, as in the parabolic walls of the tholos, and the outline of a pointed arch was thus obtained. (Figs. 133 and 134.) In spite of their early familiarity with the abstract principle of the arch, as shown in Fig. 130, the Greeks refused to adopt the true arch, with its wedge-shaped stones, even in late historical ages, when they assuredly were acquainted with its construction. An illustration of their feeling in this respect is given by the aqueduct adjoining the Tower of the Winds in Athens, where the semicircles are cut from monoliths.
The influence of the gateways upon the masonry is evident from the more frequent adoption of the rectangular blocks, which had at first only been employed to give the portals an independent strength, both for the ramparts and for the out-works and protecting towers which these openings necessitated. Such a fortification, erected for the defence of a gate, still stands in Tiryns—the city to which succeeding ages ascribed the invention of tower-building (Pliny, Hist. Nat. vii. 56); it reaches a height of 13 m. Thetower which defended the gate of Mykenæ was even larger. Homer mentions such structures at Troy, Thebes, and Calydon, and is also familiar with casemates and battlements. The latter are shown by paintings upon archaic vases to have been of the normal rectangular shape.