It's the 5th via seventh century CE when outer structure and appearances of Hindu temples in north India and south India started to greatly diverge. Prayagrajsangam.in is a web portal started With all the vision of providing specifics of spiritual, ancient and historical locations located at Prayagraj, formerly called Allahabad. https://www.4shared.com/office/sHG3eAsdjq/Experience_the_Spiritual_Aura_.html