 After graduating from Schulpforta, Nietzsche entered the University of Bonn in 1864 as a theology and philology student, and his interests soon gravitated more exclusively towards philology—a discipline which then centered upon the interpretation of classical and biblical texts. As a student of philology, Nietzsche attended lectures by Otto Jahn (1813–1869) and Friedrich Wilhelm Ritschl (1806–1876). Jahn was a biographer of Mozart who had studied at the University of Berlin under Karl Lachmann (1793–1851)—a philologist known both for his studies of the Roman philosopher, Lucretius (ca. 99–55 BCE), and for having developed the genealogical, or stemmatic, method in textual recension; Ritschl was a classics scholar whose work centered on the Roman comic poet, Plautus (254–184 BCE).