 Frege studied at a grammar school in Wismar and graduated in 1869.His teacher Gustav Adolf Leo Sachse (5 November 1843 – 1 September 1909), who was a poet, played the most important role in determining Frege's future scientific career, encouraging him to continue his studies at the University of Jena.Frege matriculated at the University of Jena in the spring of 1869 as a citizen of the North German Confederation.