In the year 1180, Emperor Barbarossa granted the duchy of Bavaria to the Wittelsbach family. For over 700 years, until 1918, this noble family would rule as dukes, electors and, finally, kings of Bavaria, and would thus rule over the Bavarian Danube. The Wittelsbachs’ granting of town ordinances and privileges to Straubing (1218) and Deggendorf (1250) show the importance that the dukes attached to the waterway. Using the profits from the large Danube county of Bogen, thanks to an adroit marriage policy, in 1242 the Wittelsbachs moved over the Danube and reached the Bavarian Forest. One interesting detail is that they adopted the blue and white lozenges of the counts of Bogen and incorporated them into the Bavarian coat of arms. At the end of the 13th century, from the Altmühl river all the way to Engelhartszell, the Danube flowed through Wittelsbach territory on either side of its banks. In 1220, the Bishopric of Passau had been raised to a prince-bishopric by imperial degree, and thus unified both ecclesiastic and secular power “under the crozier”. One outstanding historical figure was Wolfger von Erla, who occupied the bishop’s throne from 1194 to 1204. One finds a single mention of the minnesinger Walther von der Vogelweide in his entourage, in an official document dating from 1203: Wolfger pays “the singer Walther von der Vogelweide six solidi to purchase a fur”. Until the secularisation of 1803, the prince-bishops of Passau ruled independently of both Bavaria and Austria. The dukes of Bavaria had to withdraw from Regensburg after the city was granted rights of freedom in the 13th century, which made it subordinate to the Emperor alone, as a Free Imperial City. Regensburg became the proverbial “lost capital of Bavaria”. Until the end of the Middle Ages, the city represented the largest and – in both a political and economic sense – the most important urban settlement in Southern Germany. The Regensburg merchants held the chair at the Fondacco dei Tedeschi zu Venedig, the central storehouse of the German mercantile community, which traded with the Orient. In his epic Parsifal, the minnesinger Wolfram von Eschenbach expressed admiration for the silks of Regensburg. In the mid-13th century, the construction of St. Peter’s Cathedral began. Bishop, citizens, monasteries, as well as the Duke, all participated in raising up a magnificent Gothic cathedral in the French style. Certainly, at that time, no one could possibly have guessed that its construction would be protracted until 1869.