Jaspers was born in Oldenburg in 1883 to a mother from a local farming community, and a jurist father. He showed an early interest in philosophy, but his father's experience with the legal system undoubtedly influenced his decision to study law at the University of Heidelberg. Jaspers first studied law in Heidelberg and later in Munich for three semesters. It soon became clear that Jaspers did not particularly enjoy law, and he switched to studying medicine in 1902 with a thesis about criminology. In 1910 he married Gertrud Mayer (1879–1974), the sister of his close friends Gustav Mayer and Ernst Mayer.