In 1834, Heinrich Heine described the daily life of Immanuel Kant in Königsberg. Aufstehn, Kaffeetrinken, Schreiben, Kollegienlesen, Essen, Spazierengehn, alles hatte seine bestimmte Zeit. Getting up, drinking coffee, writing, lecturing, eating, walking, everything had its fixed time. When Kant stepped out of his door for his walk, Heine wrote, die Nachbarn wußten ganz genau, daß die Glocke halb vier sei. The neighbors knew exactly that it was half past three. Heine wrote this three decades after Kant’s death. It is a literary portrait, not an eyewitness account.