period marked repeated invasions muslim central asian nomadic clans rule delhi sultanate growth dynasties empires built upon military technology sultanate delhi sultanate ref image qutb minar ruinsjpg caption qutub minar unesco world heritage site whose construction begun qutb ud din aybak first sultan delhi delhi sultanate muslim sultanate based delhi ruled several dynasties turkic turko indian ref name whunter william hunter rd edition pp ref pathan origins ruled large parts indian subcontinent
Humanities History Asian history Indian history