Portal:Germany/Anniversaries/May/May 21
- 996 – Otto III is crowned Holy Roman Emperor
- 1471 – Birth of artist Albrecht Dürer
- 1873 – Birth of neurologist Hans Berger, inventor of electroencephalography
- 1936 – Birth of biologist Günter Blobel, winner of the 1999 Nobel Prize in Physiology or Medicine
- 1945 – Birth of astronaut Ernst Messerschmid