The lineages of the Kagyu school of Tibetan Buddhism derive primarily from two sources: Marpa Ch�kyi Lodoe (1012-1099) and Khyungpo Nyaljor (978-1079). The former was trained as a translator by Drogmi Yeshe (993-1050), and then travelled three times to India and four times to Nepal in search of religious teachings. He studied with one hundred and eight spiritual masters and adepts, principally Naropa and Maitripa. Marpa received the lineage of tantric teachings called the Four Commissioned Lineages (bK'n-babs-bzhi) - concerning the Illusory Body and Consciousness Transference, Dreams, Clear Light, and Inner Heat directly from Naropa (1016-1100), who had been given them by his teacher Tilopa (988-1069). Their original source was Buddha Vajradhara.

Marpa brought these lineages to Tibet, passing them on to his foremost disciple Milarepa (1040-1123), the most celebrated and accomplished of Tibet's tantric yogis, who achieved the ultimate goal of enlightenment in one lifetime. Milarepa was given responsibility for his meditation lineage and others such as Ngog Choku Dorjey, Tsurton Wangey and Meton Chenpo became holders of Marpa's teaching lineage. This is how the dual system of philosophical training (bShad-grva) and the meditation training (sGub-grva) are found established in Kagyu monasteries. Among Milarepa's disciples, Gampopa (1084-1161), also known as Dagpo Lhaje and Rechungpa (1084-1161) were the most illustrious. The former received the teaching and practice of the Great Seal (Mahamudrn) and the Six Yogas of Naropa from Milarepa and synthesised them into one lineage. The resultant combined lineage came to be known as Dakpo Kagyu, the mother lineage of the Kagyu tradition. Gampopa also pioneered a fusion of Milarepa's Mahamudra tradition with the stages of the path tradition of the Kadampa order. Gampopa's Jewel Ornaments of Liberation is prominent amongst the stages of the path literature of Tibet. The Kagyu Mahamudra lineage was later incorporated into the Gelug tradition by the First Panchen Lama, Lobsang Ch�kyi Gyeltsen (1570-1662) and is known as the Ganden-Kagyu Tradition of Mahamudra.

The Dakpo Kagyu tradition gave rise to four major schools founded by illustrious disciples of Gampopa.The Kamtsang or Karma Kagyu was founded by the first Karmapa, Dusum Khyenpa (1110-1193). This tradition has remained strong and successful due in large part to the presence of an unbroken line of reincarnations of the founder, the successive Karmapas. Famous among them were the Second Karmapa, Pakshi (1206-1282), the third Karmapa, Ranjung Dorjey (1284-1339) and the Eighth, Karmapa Mikyo Dorjey (1507-1554). The most recent incarnation was the Sixteenth Karmapa, Ranjung Rigpe Dorjey (1924-81), who in exile was also appointed bead of the whole Kagyu tradition. In Tibet, Tsurphu, located in Central Tibet was the main monastery of this tradition. After coming into exile, the tradition has re-established its headquarters and principal monastic university at Rumtek in Sikkim. It has also developed hundreds of centres throughout the world. In the present absence of the Gyalwa Karmapa's incarnation four high lamas who were his disciples are acting as regents. They are Shamar Rinpoche, Gyaltsab Rinpoche, Situ Rinpocheand Jamgon Kongtrul Rinpoche.

The Shangpa Kagyu main practices concerned Mahakala, Chakrasambhava, Hevajra, Mahamaya, Guhyasamaja, the Six Doctrines of Niguma, Mahamudra, and others. The principal contemporary exponent of this tradition was the late Kalu Rinpoche (1905-1989), one of the leading Kagyu meditation masters of this century. It should be noted that while there are many sub-schools within Kagyupas, the fundamental principles of their doctrine are rooted in Mahamudra and the Six Yogas of Naropa. The different schools have arisen only due to slightly different individual approaches to the fundamental teachings.

Mahamudra, the unique feature of Kagyu tradition, can be explained according to interpretations of sutra and tantra. Both aspects of the teachings are aimed at direct understanding of the real nature of the mind. The approach to Mahamudra, which differs slightly within each Kagyu school, generally follows through the stages of foundation, path and fruit. Tantric practices unique to Kagyu tradition are the Six Yogas of Naropa, Cakrasambhava and Mahakala. In the context of tantric practice, the application of Mahamudra becomes much more profound and sophisticated.

The training of monks in Kagyu monasteries consists mainly of the study of the Perfection of Wisdom, Madhyamika, Valid Cognition, Discipline and Phenomenology common to all traditions, except that each tradition has its own monastic texts and commentaries to facilitate understanding of the original Indian texts.