were Rupa Goswami, Sanatana Goswami, Gopala Bhatta Goswami, Raghunatha Bhatta Goswami, Raghunatha dasa Goswami and Jiva Goswami. In the second generation of the tradition, Narottama, Srinivasa and Shyamananda, three students of Jiva Goswami, the youngest among the six Goswamis, were instrumental in spreading the theology across Bengal and Orissa. The festival of Kheturi (approx 1574), presided over by Jahnava Thakurani, the wife of Nityananda Rama, was the first time the leaders of the various branches of Chaitanya Mahaprabhu's followers assembled together. Through such festivals, members of the loosely organized tradition became acquainted with other branches along with their respective theological and practical nuances. That notwithstanding, the tradition has maintained its plural nature, having no central authority to preside over its matters. The festival of Kheturi allowed for the systemization of Gaudiya Vaishnava theology as a distinct branch of Vaishnava theology. 17th–18th century During the 17th–18th centuries, there was a period of general decline in the movement's strength and popularity, its "lethargic state", characterized by decreased public preaching and the rise of persons following and promoting tantric teachings and practices. These groups are called apasampradayas by the Chaitanyaits. In the 17th century, Vishvanath Chakravarti Thakur held great merit in clarifying core doctrinal issues over the practice of raganuga-bhakti through works such as Raga-vartma-chandrika. His student Baladeva Vidyabhushan wrote a famous commentary on the Vedanta-sutra called Govinda Bhashya. The 18th century saw a number of luminaries headed by Siddha Jayakrishna Das Babaji of Kamyavan and Siddha Krishnadas Babaji of Govardhan. The latter, a widely renowned teacher of the mode of internal worship (raga-bhajan) practiced in the tradition, is largely responsible for the current form of devotional practice embraced by some of the traditions based in Vrindavan. Manipuri Vaishnavism The "Manipuri Vaishnavism" is a regional form of Gaudiya Vaishnavism with a culture-forming role among the Meitei people in the north-eastern Indian state of Manipur. There, after a short period of Ramaism penetration, Gaudiya Vaishnavism spread in the early 18th century, especially from beginning its second quarter. Raja Gharib Nawaz (Pamheiba) was initiated into the Chaitanya tradition. Most devotee ruler and propagandist of Gaudiya Vaishnavism, under the influence of Natottama Thakura's disciples, was raja Bhagyachandra, who has visited the holy for the Chaytanyaits Nabadwip. Rasa Lila dance became a feature of the regional folk and religious tradition. 20th century From the very beginning of Chaitanya's bhakti movement in Bengal, Haridasa Thakur and others Muslim