IN 2009, 30-YEAR-OLD Mélanie Joly’s art collection began with a gift from family friends: a series of postcards featuring photos of Lebanon that were taken by Montreal artist Martin Désilets in 2001. Joly, then a managing partner at Montreal public-relations firm Cohn-Wolf, had long been an avowed art lover. That same year, she launched the Printemps du MAC fundraiser at the Museum of Contemporary Art in Montreal. The volunteer gig fed Joly’s passion for art.