The Mohammedan monuments of India are characterized by a grandeur and amplitude of disposition, a symmetry and monumental dignity of design which distinguishes them widely from the picturesque but sometimes trivial buildings of the Arabs and Moors. Less dependent on color than the Moorish or Persian structures, they are usually built of marble, or of marble and sandstone, giving them an air of permanence and solidity wanting in other Moslem styles except the Turkish. The dome, the round minaret, the pointed arch, and the colossal portal-arch, are universal, as in Persia, and enamelled tiles are also used, but chiefly for interior decoration. Externally the more dignified if less resplendent decoration of surface carving is used, in patterns of minute and graceful scrolls, leaf forms, and Arabic inscriptions covering large surfaces. The Arabic stalactite pendentive star-panelling and geometrical interlace are rarely if ever seen. The dome on the square plan is almost universal, but neither the Byzantine nor the Arabic pendentive is used, striking and original combinations of vaulting surfaces, of corner squinches, of corbelling and ribs, being used in its place. Many of the Pathan domes and arches at Delhi, Ajmir, Ahmedabad, Shepree, etc., are built in horizontal or corbelled courses supported on slender columns, and exert no thrust at all, so that they are vaults only in form, like the dome of the Tholos of Atreus (Fig. 24). The most imposing and original of all Indian domes are those of the +Jumma Musjid+ and of the +Tomb of Mahmud+, both at Bijapur, the latter 137 feet in span (Fig. 85). These two monuments, indeed, with the Mogul Taj Mahal at Agra, not only deserve the first rank among Indian monuments, but in constructive science combined with noble proportions and exquisite beauty are hardly, if at all, surpassed by the greatest triumphs of western art. The Indo-Moslem architects, moreover, especially those of the Mogul period, excelled in providing artistic settings for their monuments. Immense platforms, superb courts, imposing flights of steps, noble gateways, minarets to mark the angles of enclosures, and landscape gardening of a high order, enhance greatly the effect of the great mosques, tombs, and palaces of Agra, Delhi, Futtehpore Sikhri, Allahabad, Secundra, etc.