The leaves of the door turned on pivots, the point of which rested in a cavity hollowed out for this purpose in a great block of diorite. M. de Sarzec brought to the Louvre a large number of these natural blocks, which were found buried in the pavement so as only to rise an inch or two above the surface. On the smooth surface of each of them it is seen that the socket, hollowed out in the form of a conical cup, has undergone an incessant friction; round the hole an inscription, sometimes circular, was engraved (fig. 5). To prevent the wooden pivot of the doors from wearing out too rapidly, it was enveloped in a metal sheath, which took the form of a funnel, and which was fixed to the wood by means of nails. One of these bronze cups has been found at Tello, still in place on the socket.[13] [Illustration: Fig. 5.--Socket for pivot of door, from Tello (Louvre).] [Illustration: Fig. 6.--Terra-cotta cone from Tello (Louvre).] The discoveries of Loftus and Taylor show us how the façades and the rooms of the Chaldæan palaces were decorated. The principal façade of the buildings at Abu Shahrein and Warka had a mural decoration of a kind as primitive as it was singular.[14] First it was plastered with a thick layer of clay stucco; then, before this plaster was completely dry, cones of baked clay were buried in it, like metal nails. Only the head of these cones is visible on the surface of the wall. While the stem is plunged into the thick clay and sticks there unseen. To the heads of these cones, disposed at regular distances, and acting perhaps also as talismans, various colours are applied; they are black, red, white, or yellow. Moreover, each head is separated from its neighbours by coloured geometrical lines, so that it became to the eye the centre of a lozenge or a square.