A lineage in Buddhism is a record of teachers and their disciples, or students. Several branches of Buddhism, including Zen and Tibetan Buddhism maintain records of their historical teachers who, according to the traditional history of that school, have passed the Dharma, or Buddhist teachings, from generation to generation in an unbroken line since the time of the Buddha. This vertical line is a lineage of spiritual ancestors, in Zen also called patriarchs, which provides validation of the teachings. In Zen, the experience of satori is also confirmed by the lineages so that the teachers of the present generation are known to have authentic understanding of the Dharma. In the Zen lineage an example is that Bodhidharma is considered the first Zen (Ch'an) patriarch, and the twenty-eighth suc