Dom Patrice Mahieu, Benedictine priest-monk from Solesmes, France treats on the Catholic principles of ecumenism in relation to Vatican II (Unitatis Reintegratio). Abbaye Ste-Marie Des Deux Montagnes, French (Nov 4-8); English (Nov 11-15). 2803 Chemin d'Oka. Sainte-Marthe-sur-le-Lac, QC. Info: abbayesaintemarie.ca.