Once Geneva accepted the Reformation, it became a haven for Protestant refugees from all over Europe, and Calvin gave this building over for them to worship in their own language.
Subsequently, it became a place used by numerous Protestant refugee groups including Italian Waldensians, Dutch Reformed and Scottish Presbyterians.
It was felt during the 500th anniversary of Calvin's birth, celebrated in 2009 that a more versatile organ worthy of the setting could be well used in worship and for a wide range of concerts, and attract organists from the world over to the Auditoire.
After an intensive search, a representative group from the congregations using the Auditoire, advised by François Delor, official organist of the Cathedral of St Pierre in Geneva, selected Bernard Aubertin, a renowned French organ-builder, to build the new organ.
Funds were raised through concerts, generous individual donations and support from the Hans Wilsdorf Foundation and the Loterie Romande.