Language & WorldFact
The German letter that wasn't allowed a capital until 2017.
The ß emerged in the Middle Ages as a fusion of long s and z. No German word starts with it, so there was no capital form for centuries; all-caps text used SS. Unicode added capital ẞ in 2008; the Council for German Orthography allowed it in 2017. Switzerland dropped the ß gradually: Zurich schools from 1938, NZZ in 1974.
Useful: 'STRASSE' in a passport and 'STRAẞE' on a street sign are both correct today.
Source: en.wikipedia.org