Portal:Germany/Anniversaries/January/January 28
![Samuel Thomas von Sömmering](http://upload.wikimedia.org/wikipedia/commons/thumb/1/1f/Samuel_Thomas_von_Soemmering.jpg/100px-Samuel_Thomas_von_Soemmering.jpg)
- 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