Before Johann Gottfried Tulla and others straightened the Rhine in the 19th century, the river had changed its course several times, moving the border.
His gravestone shows the so-called "Altrip corner", one of the technically most difficult sections of the Rhine straightening, near the Palatinate village of Altrip.
Johann Sebastian Bach | Johann Wolfgang von Goethe | Johann Strauss II | St. Johann in Tirol | Gottfried Wilhelm Leibniz | Johann Heinrich Pestalozzi | Johann Albert Fabricius | Johann Christian Bach | Gilbert Gottfried | Johann Georg Wagler | Johann Pachelbel | Johann Nepomuk Hummel | Johann Gottfried Herder | Gottfried Keller | Johann Nestroy | Johann Joachim Winckelmann | Johann Gottlieb Fichte | Johann Bernhard Fischer von Erlach | Johann Homann | Johann Friedrich Böttger | Gottfried von Einem | Gottfried Silbermann | Gottfried August Bürger | Johann Kuhnau | Johann Heinrich Lambert | Johann Friedrich Blumenbach | Johann Wilhelm von Müller | Johann Wilhelm, Elector Palatine | Johann Mattheson | Johann Jakob Engel |