The supports are of two types,--the pillar and the column. Some are cut from single blocks. Thus, the monolithic pillars of the temple of the sphinx (Note 8), the oldest hitherto found, measure 16 feet in height by 4- 1/2 feet in width. Monolithic columns of red granite are also found among the ruins of Alexandria, Bubastis,[12] and Memphis, which date from the reigns of Horemheb and Rameses II., and measure some 20 to 26 feet in height. But columns and pillars are commonly built in courses, which are often unequal and irregular, like those of the walls which surround them. The great columns of Luxor are not even solid, two-thirds of the diameter being filled up with yellow cement, which has lost its strength, and crumbles between the fingers. The capital of the column of Taharka at Karnak contains three courses, each about 48 inches high. The last and most projecting course is made up of twenty-six convergent stones, which are held in place by merely the weight of the abacus. The same carelessness which we have already noted in the workmanship of the walls is found in the workmanship of the columns. [Illustration: Fig. 57.--Hathor pillar, Abû Simbel.] [Illustration: Fig. 58.--Pillar of Amenhotep III., Karnak.] The quadrangular pillar, with parallel or slightly inclined sides, and generally without either base or capital, frequently occurs in tombs of the ancient empire. It reappears later at Medinet Habû, in the temple of Thothmes III., and again at Karnak, in what is known as the processional hall. The sides of these square pillars are often covered with painted scenes, while the front faces were more decoratively treated, being sculptured with lotus or papyrus stems in high relief, as on the pillar- stelae of Karnak, or adorned with a head of Hathor crowned with the sistrum, as in the small speos of Abû Simbel (fig. 57), or sculptured with a full-length standing figure of Osiris, as in the second court of Medinet Habû; or, as at Denderah and Gebel Barkal, with the figure of the god Bes. At Karnak, in an edifice which was probably erected by Horemheb with building material taken from the ruins of a sanctuary of Amenhotep II. and III., the pillar is capped by a cornice, separated from the architrave by a thin abacus (fig. 58). By cutting away its four edges, the square pillar becomes an octagonal prism, and further, by cutting off the eight new edges, it becomes a sixteen-sided prism. Some pillars in the tombs of Asûan and Beni Hasan, and in the processional hall at Karnak (fig. 59), as well as in the chapels of Deir el Baharî, are of this type. Besides the forms thus regularly evolved, there are others of irregular derivation, with six, twelve, fifteen, or twenty sides, or verging almost upon a perfect circle. The portico pillars of the temple of Osiris at Abydos come last in the series; the drum is curved, but not round, the curve being interrupted at both extremities of the same diameter by a flat stripe. More frequently