Background: Starting in 2019, the project "To compile and publish 108 volumes of traditional medicine, to protect the heritage of the ancient medical sources, and to open up its commercial opportunities for use" has been implemented.
As a result of this project, 50 volumes of books were published, including books created by Mongolian ancient doctors and maarambas, translated medical books from Chinese, Manchu, and Tibetan, as well as some books written by traditional medicine researchers and scientists between 1990-2020, have been published and made available to the public. During the creation of 108 volumes of traditional medicine, dozens of ancient medical scriptures were newly discovered. Among them, we have found medicinal books written by Indian and Tibetan scholars and monks from the 8th and 13th centuries. One of them is The Third Karmapa, Rangjung Dorje's sutra, "The Ocean of Medicinal Names." Therefore, it is imperative that we first study the biography and works of The Third Karmapa, Rangjung Dorje. Purpose: Clarifying the biography and works of The Third Karmapa, Rangjung Dorje, the author of the book "The Ocean of Medicinal Names". Research methods: Research of source documents (ancient sources), hermeneulic approach, analysis, and synthesis methods were used. Conclusion
1. The Third Karmapa, Rangjung Dorje, who lived between 1284 and 1339, was a prominent Tibetan religious and cultural figure, a famous author of many books who contributed to strengthening the foreign relations between Mongolia and Tibet and increasing the influence of the Garmaa Gaajud tradition in Yuan Dynasty.
2. Although Karmapa. Rangjung Dorje lived at the end of the 13th century and the first half of the 14th century, he was a well-known, active and creative monk. Therefore, his image has been left in many paintings and cast as God's image. In particular, he wrote an interesting book about medicinal raw materials called "The Ocean of Medicinal Names," which has only a few pages but briefly contains the names and potencies of 768 medicinal raw materials.