Theravada

Theravada is the oldest-surviving denomination of Buddhism.
History of Theravada Buddism.
Theravada was founded in Nepal. It is relatively conservative, and generally closest to early Buddhist practice. For many centuries it has been the main religion of Sri Lanka (now about 70% of the population) and most of continental Southeast Asia (Cambodia, Laos, Myanmar, and Thailand). Theravada is also practiced by minorities in parts of southwest China (by the Shan and Tai ethnic groups), Vietnam (by the Khmer Krom), Bangladesh (by the ethnic groups of Baruas, Chakma, and Magh), Malaysia and Indonesia. 
Theravada today.
Recently this oldest-surviving denomination of Buddhism gaining popularity in Singapore and the Western world. Today Theravada Buddhists, who are also known as Theravadins, number over 100 million worldwide; in recent decades Theravada has begun to take root in the West and in the Buddhist revival in Nepal.
International Buddhist Meditation Center operates in Kathmandu.