formulae, which were derived by experience of other civilisations, in their constructions in India. Such use of scientific principles helped not only in obtaining greater strength and stability of the construction materials but also provided greater flexibility to the architects and builders. One fact that must be stressed here is that, the Islamic elements of architecture had already passed through different experimental phases in other countries like Egypt, Iran and Iraq before these were introduced in India. Unlike most Islamic monuments in these countries, which were largely constructed in brick, plaster and rubble, the Indo-Islamic monuments were typical mortar-masonry works formed of dressed stones. It must be emphasized that the development of the Indo-Islamic architecture was greatly facilitated by the knowledge and skill possessed by the Indian craftsmen, who had mastered the art of stonework for centuries and used their experience while constructing Islamic monuments in India. Islamic architecture in India can be divided into two parts: religious and secular. Mosques and Tombs represent the religious architecture, while palaces and forts are examples of secular Islamic architecture. Forts were essentially functional, complete with a little township within and various fortifications to engage and repel the enemy. Mosques There are more than 300,000 active mosques in India, which is higher than any other country, including the Muslim world. The mosque or masjid is a representation of Muslim art in its simplest form. The mosque is basically an open courtyard surrounded by a pillared verandah, crowned off with a dome. A mihrab indicates the direction of the qibla for prayer. Towards the right of the mihrab stands the minbar or pulpit from where the Imam presides over the proceedings. An elevated platform, usually a minaret from where the Faithful are summoned to attend prayers is an invariable part of a mosque. Large mosques where the faithful assemble for the Friday prayers are called the Jama Masjids. Tombs and Mausoleum The tomb or maqbara could range from being a simple affair (Aurangazeb's grave) to an awesome structure enveloped in grandeur (Taj Mahal). The tomb usually consists of a solitary compartment or tomb chamber known as the huzrah in whose centre is the cenotaph or zarih. This entire structure is covered with an elaborate dome. In the underground chamber lies the mortuary or the maqbara, in which the corpse is buried in a grave or qabr. Smaller tombs may have a mihrab, although larger