WSU ORGAN DAY 2015. Bravo to Lynne Davis for an excellent mini-workshop on the French Organ. Bertrand Cattiaux lectured on french organ building. Cattiaux is the organ builder responsible for ongoing improvements to the great organ of Notre Dame, Paris . Stéphane Béchy is a renowned concert artist and Titular Organist of St-Merry. Béchy lectured and performed pieces composed by the past organists of St-Merry. Seated left to right: Bertrand Cattiaux, Lynne Davis, Stéphane Béchy.