Was trying to remember how the heck I knew Avignon, now Google has helped me in this respect. The oilfield equipment manufacturer, Cameron Iron Works (since 2016 part of the Schlumberger empire), used to have a plant in Béziers in the neighbouring region to the west of Provence. Was on a business trip there a long time ago, afterwhich I must have driven the 100-miles along the A9 through Montpelier, Nimes, to Avignon. In the brief visit to Avignon was struck by the extraordinary history of the city itself, and the beauty of the surrounding countryside. Where I went to after Avignon, haven't a clue, but I must have got home again safely!