Accomplished Buddhist masters authored many treatises that explain the meaning of the Buddha's teachings. The emphasis was on the authentic and accurate transmission of the teachings. Over the centuries different lines of transmission, each with its own characteristics, came about.
The Kagyu Lineage
The Kagyu school, particularly known for its emphasis on meditation practice, was founded by Marpa (AD 1012-1097), and Milarepa (AD 1040-1123). The school originated from the Indian master Tilopa, who lived in Northern india sometime around the 10th century A.D, and spread throughout the Himalayas, including Tibet. Marpa had traveled to India to study with Indian Buddhist masters. Milarepa, generally considered as one of Tibet's most famous yogis, was born in Tibet, and became a student of Marpa. Today, the Kagyu lineage of Buddhism is practiced worldwide.
The Karmapas
Gyalwang, 'King of the Victorious Ones', Karmapa, is the head of the Karma Kagyu, the largest sub-school of the Kagyu tradition. The Karmapa represents the oldest line of reincarnated Tibetan Buddhist masters, dating 900 years back to the 11th century. The primary sources of the Karma Kagyu lineage are the “words of the Buddha” translated into Tibetan. The current Karmapa, Trinley Thaye Dorje, is the 17th Karmapa.
The Shamarpas
The third Karmapa gave his principal disciple a ruby-red crown and the title Shamarpa, establishing the second line of reincarnate lamas in Tibetan Buddhism. This was the fulfillment of a prediction of the second Karmapa, who said "Future Karmapas will manifest in two forms", the Karmapas and the Shamarpas. Shamar Rinpoche (1952-2014), was the 14th Shamarpa. The Bodhi Path Buddhist Centers were founded by him. For more information, please visit http://www.bodhipath.org/lineage