Portal:Germany/Anniversaries/January/January 13
- 1635 – Birth of theologian Philipp Jakob Spener, known as the "Father of Pietism"
- 1775 – Death of theologian Johann Georg Walch
- 1782 – Friedrich Schiller's drama Die Räuber premieres in Mannheim
- 1935 – A plebiscite in the Saar area approves accession to Nazi Germany