Pope Francis is visiting the French port city of Marseille, for centuries a multiethnic and multifaith melting pot, to amplify his call for the Mediterranean to be a place of welcome for migrants. It's an increasingly lonely voice in Europe, where some countries are turning more and more to border fences, repatriations and talk of a naval blockade to keep a new influx of would-be refugees out. Francis is presiding over the closing session of a gathering of Mediterranean Catholic bishops, but his two-day visit that begins Friday is aimed at sending a message well beyond the Catholic faithful to Europe, North Africa and beyond.