Tragöß is a municipality in the district of Bruck an der Mur in Styria, Austria. It is home to Green Lake (Grüner See), which dries out almost completely in the autumn. In the spring the lake is filled with snow melt runoff. This gives the lake crystal clear water, the existing rocks and meadow give the lake its green colour. During early Roman times, Styria was inhabited by Celtic tribes. After its conquest by the Romans, the eastern part of what is now Styria was part of Pannonia, while the western one was included in Noricum. During the Barbarian invasions, it was conquered or crossed by the Visigoths, the Huns, the Ostrogoths, the Rugii, the Lombards, the Franks and the Avars. In 595, the Avars were defeated by the Slavs.
