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.