The conflict between Hindus and Muslims in the Indian subcontinent has a complex history which can be said to have begun with the Umayyad Caliphate's invasion of Sindh in 711. The persecution of Hindus during the Islamic expansion in India during the medieval period was characterised by destruction of temples, often illustrated by historians by the repeated destruction of the Hindu Temple at Somnath[252][253] and the anti-Hindu practices of the Mughal emperor Aurangzeb.[254] Although there were instances of conflict between the two groups, a number of Hindus worshipped and continue to worship at the tombs of Muslim Sufi Saints.[255]