The earliest known traces of wine were found near Tbilisi, Georgia. The earliest known winery, from c. 4100 BCE, is the Areni-1 winery in Armenia. The subsequent spread of wine culture around the Mediterranean was probably due to the influence of the Phoenicians and Greeks. The Phoenicians exported the wines of Byblos, which were known for their quality into Roman times. Industrialized production of wine in ancient Greece spread across the Italian peninsula and to southern Gaul. The ancient Romans further increased the scale of wine production and trade networks, especially in Gaul around the time of the Gallic Wars. The Romans discovered that burning sulfur candles inside empty wine vessels kept them fresh and free from a vinegar smell, due to the antioxidant effects of sulfur dioxide, which is still used as a wine preservative.