From the corridor a door opens into each of the five courts, B and C on the east side, forming the eastern wing of the palace, H and G on the west side, forming the western wing, and E to the south. The courts have no direct communication with each other. The chambers on the north and south sides of these courts are all arranged in lîwân groups, but there are differences in detail between courts B and H on the one hand, and courts C and G on the other, while the position and size of court E has led to further modifications. Court B (Plate 33, Figs. 1 and 2) measures 15·20 metres from north to south, and 17·60 metres from east to west, but on the west side ·40 metre is occupied by a shallow blind arcade, and on the east side 3 metres was taken up by an arcaded passage which is now ruined. The blind arcade is composed of five arches carried by engaged piers which have an average width of ·70 metre. The arches are round and spring directly from the piers without the interposition of impost or capital. In the central of the five intercolumniations is placed the door from the corridor. To the north and to the south of the court lies a lîwân group of three vaulted chambers. The lîwân opens on to the court through an archway 2·60 metres wide flanked by engaged columns and piers (Plate 34, Fig. 1). The side chambers communicate by means of arched doorways with small antechambers, which in turn open into the court through arched doorways 2·05 metres wide, flanked by engaged columns (Plate 34, Fig. 2. The mass of brickwork which partly blocks the doorway is a later addition). The antechambers are roofed with barrel vaults running east and west, which are separated from the outer end of the lîwân vault by transverse arches; thus the vault of the lîwân is enabled to run through to the wall of the court (Plate 35, Fig. 1). Structurally, the antechambers are therefore distinct from the outer end of the lîwân; practically the antechambers and the outer end of the lîwân form a kind of narthex, the outer end of the lîwân being part of the narthex and not an integral part of the reception-room. This fact is accentuated by the position of the side doors in the lîwân. The sitting space along the walls ends with these doors, and for practical purposes the lîwân is no longer than the side chambers. The capitals of the engaged columns are rectangular impost blocks of stone masonry. Between the parallel barrel vaults there is the usual system of tubes (Fig. 4). The tubes running north and south are carried over the transverse arches of the antechambers, and their openings appear on the façade of the lîwân groups. Where the façade has fallen, as, for example, on the south side of court B, the construction can be clearly traced, and it is also possible to observe that tubes ran from east to west between the wall of the façade and the barrel vaults of the antechambers, as well as on the inner side of the same barrel vaults. Perhaps these tubes were