Introduction of arch and dome architecture, blending Indian and Persian styles.
- The new rulers needed houses and places of worship.
- They initially converted temples and other buildings into mosques and used their materials for new constructions, such as the Quwwat-ul-Islam mosque near the Qutab Minar and the building at Ajmer called Arhai Din ka Jhonpra.
- The decoration on these new constructions used scrolls of flowers and verses from the Quran, as human and animal figures were considered un-Islamic.
- The Turks started constructing their buildings, using indigenous craftsmen and some master architects from West Asia.
- The use of the arch and the dome, borrowed from Rome through the Byzantine Empire, became widespread in north India with the arrival of the Turks.
- These architectural elements allowed for large halls with clear views and required strong cement, which the Turks made using fine-quality light mortar.
- The skill of Indian stone-cutters was fully utilized, and the Turks added color to their buildings using red sandstone, yellow sandstone, and marble.
- The Qutab Minar, a magnificent tapering tower, was completed by Iltutmish and exemplifies the use of these architectural techniques.