while Dupaix refers to it as consisting of large stone flags, carefully joined together.[497] [Illustration: The Palace Restored.] [Illustration: Architectural Features at Palenque.] The neighboring buildings, such as the Temple of the Three Tablets, the Temple of the Cross, and the Temple of the Sun, each have well-preserved roofs of masonry, which are quite remarkable. The first of these stands upon its lofty pyramidal base, measuring one hundred and ten feet on the slope, with continuous steps on all sides. The temple, which is thirty-five feet high, is crowned with a sloping ornamental roof of great beauty. Stephens illustrated the temple in several views, subsequently copied by Bancroft.[498] The roof is divided into three parts; the lower section recedes from the cornice with a gentle slope, and resembles the corresponding section of a French or Mansard roof. The stucco decorations of this lower section, which is also painted, add considerably to the general effect. Five solid square projections with perpendicular faces suggestive of the attic windows of a modern French roof are found on this section, corresponding to the several doors of the temple immediately below. The second section, which slopes back at a more acute angle, is of solid masonry. The crowning section seems to have been purely ornamental, consisting of a line of pillars of stone and mortar, eighteen inches high and twelve inches apart, surmounted by a layer of flat stones with projecting sides. The Temple of the Cross and Temple of the Sun both have roof-structures which may be described as resembling a lattice-work of stone. The most interesting feature of Palenque architecture is the arch, of which there are two styles, if one of them may be classed as an arch at all; of this we have doubts. The style to which we allude is that which has been designated as the Yucatan arch. A section of the double corridor of the palace furnishes an example as shown in the cut from Mr. Bancroft’s work. [Illustration: Section of Palace Corridor.] This so-called arch is nothing more than the approach of two walls toward each other in straight lines, nearly forming an acute angle at the top. These inclining walls are constructed of overlapping stones, with a small surface of exposed ceiling, produced by a lintel-like covering. The principal doorway, which is eighteen feet high, is constructed in the form of a trefoil arch, while niches or depressions of the same trefoil form are ranged along the inclined face of the gallery on each side of the entrance. This arch is suggestive of the Moorish pattern, though the latter probably is the more modern. The accompanying cut—a photographic reduction from Waldeck—will convey a clear idea of its form.