Friedrich Ludwig Jahn (Turnvater Jahn) (August 11th 1778, Lanz - October 15th 1852, Freyburg) was a German Prussian gymnastics educator and patriot. Jahn studied theology and philology from 1796 to 1802 at Halle, Göttingen at the Greifswald. After Jena he joined the Prussian army. In 1809 he went to Berlin, where he became a teacher at the Gymnasium zum Grauen as well as at the Plamann School. Brooding upon the humiliation of his native land by Napoleon, he conceived the idea of restoring the spirits of his countrymen by the development of their physical and moral powers through the practice of gymnastics. The first Turnplatz, or open-air gymnasium, was opened by him at Berlin in 1811, and the movement (Turnverein) spread rapidly, the young gymnasts being taught to regard themselves as members of a kind of gild for the emancipation of their fatherland. This patriotic spirit was nourished in no small degree by the writings of Jahn. Early in 1813 he took an active part at Breslau in the formation of the famous corps of Lützow, a battalion of which he commanded, though during the same period he was often employed in secret service. After the war, he returned to Berlin, where he was appointed state teacher of gymnastics. As such, he was a leader in the formation of the student Burschenschaften1811 was a common year starting on Tuesday (see link for calendar). ....

A man of democratic nature, rugged, honest, eccentric and outspoken, Jahn often came into collision with the reactionary spirit of the time, and this conflict resulted in 1819 in the closing of the Turnplatz and the arrest of Jahn himself. Kept in semi confinement at the fortress of Kolberg until 1824, he was then sentenced to imprisonment for two years and served one year, though he was forbidden to live within ten miles of Berlin. He therefore took up his residence at Freyburg on the Unstrut, where he remained until his death, with the exception of a short period in 1828, when he was exiled to Colleda on a charge of sedition. In 1840, he was decorated by the Prussian government with the Iron Cross for bravery in the wars against Napoleon. In the spring of 1848 he was elected by the district of Naumburg to the German National Parliament. Jahn died on in Freyburg, where a monument was erected in his honor in 1859. Jahn invented the parallel bars, balance beam, gymnastics rings, vaulting horse and the horizontal bar. He is often described as the "father of gymnastics" (Turnvater).

Friedrich Ludwig Jahn, popularized the motto "Frisch, Fromm, Fröhlich, Frei" ("Hardy, God-fearing, Cheerful, Free") in the early nineteenth century. Among his works are the following: Bereicherung des hochdeutschen Sprachschatzes (Leipzig, 1806), Deutsches Volksthum (Lübeck, 1810), Runenblätter (Frankfurt, 1814), Neue Runenblätter (Naumburg, 1828), Merke zum deutschen Volksthum (Hildburghausen, 1833), and Selbstvertheidigung (Vindication) (Leipzig, 1863).