The wrathful looking deities of Tibetan Buddhism range from protectors of particular places (such as the city of Lhasa in Tibet) to preservers of specific Buddhist Tantra teachings (like the Chakrasamvara, Hevajra, Kalachackra and Guhyasamaja Tantra) to vanquishers of evil spirits. But most importantly, and in addition to their other functions, all of these ferocious deities are believed to assist devotees in their quest for enlightenment.