The Dudjom lineage is one of the most important in the Nyingma tradition. A famous prayer written by Dudjom Rinpoche, Jigdral Yeshe Dorje, is called the Pearl Necklace and is recited frequently by all practitioners of this tradition, as it brings to mind all the great beings who have been part of it. Thinley Norbu Rinpoche, the eldest son of Dudjom Rinpoche and considered an emanation of Longchenpa, wrote a commentary to this prayer now published as The Ruby Rosary: Joyfully Accepted by Vidyadharas and Dakinis as the Ornament of a Necklace. The first half of this work is a clear account of how the teachings of the Buddha, including the the Shravakayana, Mahayana, and Vajrayana teachings, all came to be. The second half details the nineteen primary incarnations of the Dudjom line.