Portal:Germany/Anniversaries/January/January 28
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- 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