Some of the activities which were prevalent during the Delhi Sultanate period are as follows: religious persecution, prohibition of public worship and destruction of temples. These was often vigorously enforced by the early Muslim rulers.
Abu Rayhan Beruni or Alberonius (Latin) was a Persian Scholar and polymath of the 11th century. He accompanied Mahmud Ghazani in his conquests to South Asia.Al Beruni was the First Muslim Scholar to study India and its Brahmanical tradition. He is called father of Indology and the first anthropologist. He is called one of the earliest and greatest polymath of the Islamic World.