 The well constructed road was in use throughout the Middle Ages as part of the trade route between Aquileia and Salzburg, also after the Carnia region in the south was conquered by the Republic of Venice in 1420.The former "mansio" at Timau ("Tischelwang", today part of Paluzza) south of the pass was resettled by miners from Carinthia, up to today it is a German-speaking enclave on Italian territory.Upon the 1809 Treaty of Schönbrunn, Napoleonic troops crossed the Plöcken Pass to occupy the Upper Carinthian lands around Villach, which had been ceded to the French Empire as part of the Illyrian Provinces.