Leobersdorf is a town in the Baden district of Lower Austria, Austria. First indices of settlement in the area date back to 3000 BC. Around 350 B…Leobersdorf is a town in the Baden district of Lower Austria, Austria. First indices of settlement in the area date back to 3000 BC. Around 350 BC Celtic settlers found Noricum, from their word Tristis, which means rushing or dangerous, derived the name for the river Triesting which flows through Leobersdorf.