The principal apartment in all the buildings situated on the platform is a central square hall, the floor of which is studded with pillars placed equidistant the one from the other. The smallest have 4 pillars, the next 16, then 36, and one has 100 pillars on its floor; but to avoid inventing new names, we may call these respectively, distyle, tetrastyle, hexastyle, and decastyle halls, from their having 2, 4, 6, or 10 pillars on each face of the phalanx, and because that is the number of the pillars in their porticoes when they have any. The building at the head of the great stairs is a distyle hall, having 4 pillars supporting its roof. On each side of the first public entrance stands a human-headed winged bull, so nearly identical with those found in Assyrian palaces as to leave no doubt of their having the same origin. At the opposite entrance are two bulls without wings, but drawn with the same bold, massive proportions which distinguish all the sculptured animals in the palaces of Assyria and Persia. The other, or palace entrance, is destroyed, the foundation only remaining; but this, with the foundations of the walls, leaves no room to doubt that the annexed woodcut (No. 89) is a true representation of its ground-plan.[93] Nor can it be doubted that this is one of those buildings so frequently mentioned in the Bible as a “gate,” not the door of a city or buildings, but a gate of justice, such as that where Mordecai sat at Susa—where Abraham bought his field—where Ruth’s marriage was judged of—and, indeed, where public business was generally transacted. [Illustration: 89. Propylæa. Scale 100 ft. to 1 in.] There are three other distyle halls or gates on the platform: one to the westward of this, very much ruined; one in the centre of the whole group, which seems to have had external porticoes; and a third on the platform in front of the palace of Xerxes. [Illustration: 90. Palace of Darius. Scale 50 ft. to 1 in.] There are two tetrastyle halls, one of which, erected by Darius (woodcut No. 90), is the most interesting of the smaller buildings on the terrace. It is the only building that faces the south, and is approached by a flight of steps, represented with the whole façade of the palace as it now stands in the woodcut (No. 91). These steps led to a tetrastyle porch, two ranges in depth, which opened into the central hall with its 16 columns, around which were arranged smaller rooms or cells, either for the occupation of the king, if it was a palace, or of the priests if a temple. In the western side a staircase and doorway were added, somewhat unsymmetrically, by Artaxerxes.