The Ecumenical Institute for Study and Dialogue (EISD), formerly called Study Center for Religion and Society, is an institute located in Colombo, Sri Lanka that is devoted to the study and interpretation of religious and social movements of people in Sri Lanka, in order to assist the Church in fulfilling its duty to be a witness and service to the life of the nation. The center has been involved in successfully organising a number of dialogues, meetings and seminaries, and it has become an internationally recognised center for study and dialogue with Buddhism, along with other ecumenical concerns. The center was recognised in the 1970s and 1980s as one of the most active of all similar study centers worldwide.