Take a look at temples. Look at Islamic temples and Hindu temples in particular. Nasir al-Mulk Mosque, The Blue Mosque in Istanbul, Sri Ranganatha Swamy Temple

Take a look at temples. Look at Islamic temples and Hindu temples in particular. Nasir al-Mulk Mosque, The Blue Mosque in Istanbul, Sri Ranganatha Swamy Temple, and Meenakshi Amman Temple. It's pretty obvious to me where their inspirations came from. As far as your specific questions are concerned, I don't think this is the forum that is geared towards to these questions. You should look into mandalas, meditation, yoga, breathing techniques, mantras, etc.