() resulted in the tantric text Śrīcandramāla Tantrarāja. There are accounts of fully ordained Tibetan women, such as the Samding Dorje Phagmo (1422-1455), who was once ranked the highest female master and tulku in Tibet, but very little is known about the exact circumstances of their ordination. In the modern era, Tibetan Buddhist nuns have taken full ordinations through East Asian Vinaya lineages. The Dalai Lama has authorized followers of the Tibetan tradition to be ordained as nuns in traditions that have such ordination. Western nuns and lamas Buddhist author Michaela Haas notes that Tibetan Buddhism is undergoing a sea change in the West, with women playing a much more central role. Freda Bedi was a British woman who was the first Western woman to take ordination in Tibetan Buddhism, which occurred in 1966. Pema Chödrön was the first American woman to be ordained as a Buddhist nun in the Tibetan Buddhist tradition. In 2010 the first Tibetan Buddhist nunnery in America, Vajra Dakini Nunnery in Vermont, was officially consecrated. It offers novice ordination and follows the Drikung Kagyu lineage of Buddhism. The abbot of the Vajra Dakini nunnery is Khenmo Drolma, an American woman, who is the first bhikṣuṇī in the Drikung lineage of Buddhism, having been ordained in Taiwan in 2002. She is also the first westerner, male or female, to be installed as an abbot in the Drikung Kagyu lineage of Buddhism, having been installed as the abbot of the Vajra Dakini Nunnery in 2004. The Vajra Dakini Nunnery does not follow The Eight Garudhammas. In April 2011, the Institute for Buddhist Dialectical Studies (IBD) in Dharamsala, India, conferred the degree of geshe, a Tibetan Buddhist academic degree for monastics, on Kelsang Wangmo, a German nun, thus making her the world's first female geshe. In 2013 Tibetan women were able to take the geshe exams for the first time. In 2016 twenty Tibetan Buddhist nuns became the first Tibetan women to earn geshe degrees. Jetsunma Ahkon Lhamo gained international attention in the late 1980s as the first Western woman to be a Penor Rinpoche enthroned tulku within the Nyingma Palyul. Major lineages The Tibetan Rime (non-sectarian) scholar Jamgon Kongtrul, in his Treasury of Knowledge, outlines the "Eight Great Practice Lineages" which were transmitted to Tibet. His approach is not concerned with "schools" or sects, but rather focuses on the transmission of crucial meditation teachings. They are: The