1544 is the time in which of the centuries old quarrel around the Danube spring took her beginning. Though Sebastian Münster exerted himself, the man on the 100 mark note in 1538 for the castle spring in Donaueschingen, however, 6 years later (1544) contradicted the inhabitant of Freiburg professor Heinrich Loriti Clareanus Sebastian Münster and entered with full determination for the source rivers Brigach and Breg. The quarrel around the spring began.

Every country wanted to own the spring of the world-famous river in his area. The princes "Fürstenberg" gave to have the "Danube spring" in before her castle in Donaueschingen. The Romans had to do supposedly the Danube spring has discovered, although the proof is absent for this.

In 1702 the emperor general Marsigli, commissioned by emperor "Josef I", looked for the spring of the Danube. The spring of the Breg in the "Brücklerain" with ford cheeks explained "Marsigli" as farthest distant for the true spring of the Danube and provided 3 maps. Vicarius Breuninger of the cloister Saint Georgen, as a good Swabian, proved in 1719 with passion that the primary sources of the world-famous stream not in Donaueschingen, but on wuerttembergischen area in the Hirzwald is to be searched in the origin of the Brigach. On a map of the dukedom Wuerttemberg from that time is registered the "Bregachquelle" as fons naturalis (natural Danube spring). The Swiss mathematics professor Scheuchzer holds the spring of the Inns in grey alliances as a highest spring for the real Danube origin. Around that turns of the 18th century one added the mistake about the castle spring even in Donaueschingen. The small danube river which poured forth of the castle spring after 300-m-long run in the Brigach has been filled up. 1828 the water of the castle spring on the shortest way was escorted in 90 m of subterranean canal in the past flowing Brigach.

In 1844 the universal encyclopaedia of the Grand Duchy wrote Baden:

The Danube, the biggest stream of Germany arises with the Martin's chapel near with ford cheeks and is called Breg at the beginning. Almost all big streams in the world have several source rivers. Source rivers are not always equal. The Rhine arises as a "Vorderrhein" in the Saint Gotthard. The "Vorderrhein" is the more important source river compared with the "Hinterrhein". The Nile arises as a Kagera. The Kargara-Nile spring is the Nile spring most southern and farest from mouth. The Amazon arises as an Apurimac. The Apurimac spring is the farest spring of the Amazon from her mouth. With the Danube the spring of the Breg in the historical Martin's chapel with ford cheeks is the most western and that spring of the Danube farest from her mouth. The old Convention applies after which the uppermost strongest source load of a waters net is valid as his origin. With numerous rivers there have also been corrections around the spring how the spring researcher Dr. Ludwig Oehrlein reports