The term ‘Jamatkhana’ literally means ‘a house of assembly or gathering’. Specifically, it has come to designate a gathering space for community activities and for devotional practice among a variety of Muslim groups such as the Musta‘lian and Nizari Ismailis in certain parts of the world. In the predominantly South Asian Chishti order, the institution for Sufi activity was called jamatkhana and was centred on the residence of the shaykh. The Shi‘i Bohra and Sunni Memon communities of India also have private places of gathering called jamatkhana.
Source: Institute of Ismaili Studies
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