Gampopa, also known as Dakpo Lhaje, was a Tibetan Buddhist master who lived in the 12th century. He was born in the year 1079 in the region of Dakpo, in eastern Tibet. His father was a lay practitioner of Buddhism and his mother was a devout Buddhist nun.

Gampopa's early life was marked by tragedy, as he lost his parents at a young age. This led him to seek refuge in the Buddhist teachings and he became a monk at the age of 16. He studied under several renowned masters of the time, including Drogmi Lotsawa and Milarepa, and became well-versed in both the Kadampa and Mahamudra traditions of Buddhism.

At the age of 25, Gampopa had a profound realization of the nature of mind, which is considered to be the ultimate goal of Buddhist practice. He then became a disciple of the famous Tibetan yogi, Phagmo Drupa, and received teachings on the Six Yogas of Naropa. Gampopa's spiritual journey and understanding deepened under the guidance of Phagmo Drupa, and he eventually became his successor.

Gampopa is best known for his synthesis of the Kadampa and Mahamudra traditions, which he named the "Diamond Way." He emphasized the importance of both study and practice in the path to enlightenment, and his teachings were widely embraced by both monks and lay practitioners.

Gampopa spent the latter part of his life travelling and teaching in various regions of Tibet, spreading the teachings of the Diamond Way. He also established several monasteries and hermitages, including the famous Daklha Gampo Monastery, which became a center for the Diamond Way teachings.

Gampopa passed away in the year 1153 at the age of 74. His legacy continues to live on through his teachings and the many disciples he inspired. He is considered one of the most influential figures in Tibetan Buddhism and his teachings continue to be studied and practiced by many to this day.

In conclusion, Gampopa lived in the 12th century, from 1079 to 1153. He dedicated his life to the study and practice of Buddhism, and his teachings continue to inspire and guide practitioners towards the path of enlightenment.