In 15 BC, the Celtic kingdom of Noricum became part of the Roman Empire.
Since then the Empire's boundaries were made up along the Danube also in Wachau and the fortifications of the Limes were built along its southern banks, especially Castrum Favianis (what is now Mautern an der Donau) at the downstream end of the valley and some burgi (i.e.
The name "wachu" as such was recorded as "locus Wahowa" in 853 AD and the name of "Krems" was recorded as Urbs Chremisa in 995 AD, marking it as the oldest Austrian town.
The Babenberg Margraves, with Leopold I as their first king, ruled in Wachau from 976 AD.
The 11th century marked an Austrian dukedom of Babenberg under Henry I, in 1156; it came under the great knightly family of the Wachau, the Kuenrings and later passed on to the Babenberg.
With the dissipation of this line of rule, Duke Albrecht V (King Albrecht II) came to power in 1430.
) is an Austrian valley with a picturesque landscape formed by the Danube river.
It is one of the most prominent tourist destinations of Lower Austria, located midway between the towns of Melk and Krems that also attracts "connoisseurs and epicureans" for its high-quality wines.
It is 40 kilometres (25 mi) in length and was already settled in prehistoric times.
A well-known place and tourist attraction is Dürnstein, where King Richard the Lion-Heart of England was held captive by Duke Leopold V.
The architectural elegance of its ancient monasteries (Melk Abbey and Göttweig Abbey), castles and ruins combined with the urban architecture of its towns and villages, and the cultivation of vines as an important agricultural produce are the dominant features of the valley.