The Catalan road, also known as the Sardinian Corridor, was a route followed by the Spanish thirds in the sixteenth and seventeenth centuries, (in fact until 1714), from the Mediterranean to the Netherlands. It started in Barcelona or Naples to Genoa and from there, crossing the Duchy of Savoy, the country of Gex (Valserine), Franche-Comté and Lorraine allowing thirds - or other passengers - to reach their destination in about forty days.[1][2] At specific points, it can still be visited today