southwest, while in the northwest there are large pockets containing speakers of Hindko and Pothwari. Religions Background The Punjabi people first practiced Hinduism, the oldest recorded religion in the Punjab region. The historical Vedic religion constituted the religious ideas and practices in the Punjab during the Vedic period (1500–500 BCE), centered primarily in the worship of Indra. The bulk of the Rigveda was composed in the Punjab region between circa 1500 and 1200 BC, while later Vedic scriptures were composed more eastwards, between the Yamuna and Ganges rivers. An ancient Indian law book called the Manusmriti, developed by Brahmin Hindu priests, shaped Punjabi religious life from 200 BC onward. Later, the spread of Buddhisim and Jainism in the Indian subcontinent saw the growth of Buddhism and Jainism in the Punjab. Islam was introduced via southern Punjab in the 8th century, becoming the majority by the 16th century, via local conversion. There was a small Jain community left in Punjab by the 16th century, while the Buddhist community had largely disappeared by the turn of the 10th century. The region became predominantly Muslim due to missionary Sufi saints whose dargahs dot the landscape of the Punjab region. The rise of Sikhism in the 1700s saw some Punjabis, both Hindu and Muslim, accepting the new Sikh faith. A number of Punjabis during the colonial period of India became Christians, with all of these religions characterizing the religious diversity now found in the Punjab region. Colonial era A number of Punjabis during the colonial period of India became Christians, with all of these religions characterizing the religious diversity now found in the Punjab region. Additionally during the colonial era, the practice of religious syncretism among Punjabi Muslims and Punjabi Hindus was noted and documented by officials in census reports: Territory comprises the contemporary subdivisions of Punjab, Pakistan and Islamabad Capital Territory. Territory comprises the contemporary subdivisions of Punjab, India, Chandigarh, Haryana, and Himachal Pradesh. The Indo−Gangetic Plain West geographical division included Hisar district, Loharu State, Rohtak district, Dujana State, Gurgaon district, Pataudi State, Delhi, Karnal district, Jalandhar district, Kapurthala State, Ludhiana district, Malerkotla State, Firozpur district, Faridkot State, Patiala State, Jind State, Nabha State, Lahore District, Amritsar district, Gujranwala District, and Sheikhupura District. The Himalayan geographical division included Sirmoor State, Simla District, Simla Hill States, Bilaspur State, Kangra district, Mandi State, Suket State, and Chamba State. The Sub−Himalayan geographical division included Ambala district,