"It's very moving," said Romani-Romanian academic Cristian Padure, admiring the exhibits inside the MUCEM museum in France's second city Marseille. The show, whose title "Barvalo" means spiritually or materially rich in the Romani language, is the first such exhibition to draw together contributions from so many artists and curators within Europe's Roma minority of 12 million. Padure said it was "recognition" of the community's contributions to European culture and history after centuries of discrimination. In Romania, where the linguist grew up, Roma were slaves for five centuries until the 19th century. Among the show's exhibits is an antique ad drawn...