Friesach is a historic town in the Sankt Veit an der Glan district of Carinthia, Austria. First mentioned in an 860 deed, it is known as the …Friesach is a historic town in the Sankt Veit an der Glan district of Carinthia, Austria. First mentioned in an 860 deed, it is known as the oldest town in Carinthia. Friesach covers an area of 120.83 km² and its mean elevation is 631 meters above sea level. It is located in northern Carinthia near the border with Styria, about 40 km north of its capital Klagenfurt.