The main religion of Mongolia is the tantric Buddhism ( Vajrayana) of Tibetan lineage (Gelugpa). The links between the Mongolian Buddhism and the Tibetan Buddhism are very ancient, and very narrow. In 16th century, Helatan Khan, who tried to unify the various branches of the Mongol people, got closer to Tibetans and created Dalai Lama's title (Ocean of Wisdom), still used today.
