Ramakrishna Mission (Bengali: রামকৃষ্ণ মিশন) is an Indian religious organization which forms the core of a worldwide spiritual movement known as the Ramakrishna Movement or the Vedanta Movement. The mission is a philanthropic, volunteer organisation founded by Ramakrishna's chief disciple Vivekananda on 1 May 1897. The mission conducts extensive work in health care, disaster relief, rural management, tribal welfare, elementary and higher education and culture. It uses the combined efforts of hundreds of ordered monks and thousands of householder disciples. The mission bases its work on the principles of karma yoga.The mission, which is headquartered near Kolkata at Belur Math in Howrah, West Bengal, subscribes to the ancient Hindu philosophy of Vedanta. It is affiliated with the monastic organisation Ramakrishna Math, with whom it shares members.