Built in a period which might well be described as the height of the modern church, the organ was installed to add musical depth to the ongoing worship of the Chapel.

The east gallery of the Chapel embraces the choir loft and the pipe organ. The pipes rise in splendid array to the visual as well as musical beauty as one looks to the rear of the sanctuary.

The Chapel organ was custom-built by Cassavant Frères Limitée of St. Hyacinthe, Quebec. The organ is inspired by traditional organ building of past centuries, particularly those of the 17th and 18th centuries. It includes a large number of imitative or orchestral voices, and in many ways is a return to the classic organ of the period of Bach and his contemporaries.

The Chapel organ consists of two manual divisions and a pedal division, totalling 23 stops comprised of 28 ranks of pipes. The organ has a total of 1,563 pipes.