Enns (town) are used for agriculture. The municipality can be subdivided into the districts of Einsiedl, Enghagen, Enghagen am Tabor, Enns, Ental, Erlengraben, Hiesendorf, Kottingrat, Kristein, Kronau, Lorch, Moos, Rabenberg and Volkersdorf. The first settlements in the area of the mouth of the Enns river to the Danube date back to 4,000 years ago. Celts settled the land around 400 BC. Their kingdom of Noricum was incorporated into the Roman Empire in AD 15 and was designated as a Roman province under the reign of Emperor Claudius in AD 45. In the second and third century, the Roman camp of "Lauriacum", in
Colombana nera ripening grape variety that can be very vigorous and high yielding if not kept in check by winter pruning and green harvesting. In the early 20th century, DNA profiling found a link between Colombana nera and another Tuscan wine grape, Mammolo. The evidence suggest that Mammolo is one of the parent varieties of Colombana nera which would make the grape a sibling to Pollera nera, Caloria and Biancone di Portoferraio. In 2000, there were 172 hectares (425 acres) of Colombana nera growing in Italy. In Emilia-Romagna it is found mostly in the province of Piacena while in Tuscany it can