Now known as the Graymoor Ecumenical & Interreligious Institute, the GEI (or GEII) is an ecumenical centre operated by the Society of the Atonement at Graymoor in Garrison, New York. The current offices of the GEII are at 475 Riverside Drive, Room 1960, New York, NY 10115.

The GEII also publishes the important journal Ecumenical Trends.

Website: geii.org

• Ecumenical Study Guide on the Eucharist
  Graymoor Ecumenical Institute ~ 1976