Albania veneta
When the Turks started to conquer the Balkans in 15th century, many Christian Slavs took refuge inside Venetian Dalmatia and so even the Albania Veneta started to have a huge Serb and Albanian population. By the end of 17th century the Romance speaking population of the historical Albania Veneta was already a minority, according to Oscar Randi in his book ''Dalmazia etnica, incontri e fusioni.