Great care in execution, and great size in the units of construction, are only to be found in comparatively few of the Egyptian monuments. We have already remarked upon the painstaking skill with which the granite or limestone casing of the chambers and passages in the Gizeh pyramids was fixed. Certain buildings of the Theban period, such as the vaulted chapels in the Great Temple at Abydos, and the courts of Medinet-Abou, are notable for excellence of a similar kind. Everything, however, must in this respect give way to the Grand Gallery in the pyramid of Cheops. The Egypt of the early Pharaohs set more than one good example which later generations failed to follow. The extraordinary number of buildings which the great Theban princes carried on at one and the same time, from the depths of Nubia to the shores of the Mediterranean, made their subjects more easily satisfied in the matter of architectural thoroughness. The habit of covering every plain surface with a brilliant polychromatic decoration contributed to the same result. The workmen were always hurried. There were hardly hands enough for all the undertakings on foot at once. How, then, could they be expected to lavish minute care upon joints which were destined to be hidden behind a coat of stucco? We never encounter in Egyptian buildings any of those graceful varieties of masonry which have been adopted from time to time by all those artistic nations that have left their stonework bare. None of the various kinds of rustication, none of the alternation of square with oblong blocks, none of that undeviating regularity in the height of the courses and in the direction of the joints which by itself is enough to give beauty to a building, is to be found in the work of Egyptian masons.[58] [58] This has been well shown by Champollion _à propos_ of one of the Nubian buildings constructed by the Theban kings. He speaks thus of the _hemispeos_ of Wadi-Esseboua: "This is the worst piece of work extant from the reign of Rameses the Great. The stones are ill-cut; their intervals are masked by a layer of cement over which the sculptured decoration, which is poorly executed, is continued.... Most of this decoration is now incomprehensible because the cement upon which a great part of it was carried out, has fallen down and left many and large gaps in the scenes and inscriptions."--_Lettres d'Égypte et de Nubie_, 121.