Immigrants have long eased labor shortages on farms and factories in Italy. But churches also need foreign-born priests, like the Rev. Vincent Souly of the Ivory Coast.

© Alessandro Grassani for The New York Times

Immigrants have long eased labor shortages on farms and factories in Italy. But churches also need foreign-born priests, like the Rev. Vincent Souly of the Ivory Coast.

© Alessandro Grassani for The New York Times

Immigrants have long eased labor shortages on farms and factories in Italy. But churches also need foreign-born priests, like the Rev. Vincent Souly of the Ivory Coast.

© Alessandro Grassani for The New York Times

Etna erupts often, but it usually doesn’t release this much ash, an expert said. Tens of thousands of travelers’ plans have been disrupted in the past week.

© Danilo Arnone/Reuters