Portal:Germany/Anniversaries/January/January 28


 * 814 – Death of emperor Charlemagne
 * 1077 – The excommunication of Henry IV is lifted after the Walk to Canossa
 * 1540 – Birth of mathematician Ludolph van Ceulen, who calculated the first 35 digits of Pi
 * 1755 – Birth of physician and anatomist Samuel Thomas von Sömmering, discoverer of the macula in the human eye