Theodor Müller

Theodor Müller (born Viktor Bernhard Theodor Müller; 12 November 1790 – 23 July 1857) was a German pedagogue and school reformer who spent most of his career in Switzerland. He is best known for his German grammar textbook ''Deutsche Sprachlehre, zunächst für Berner Volksschulen'' (1838), which was widely adopted in Bernese schools and went through multiple editions. Provided by Wikipedia