On 03.07.2017 19:01, Otto Stolz via Unicode wrote:
Since German ist the only language using “ß” (if I am not mistaken), […]
Some old Sorbian (blackletter) orthographies also employed the ß. It was also used at the beginning of words where it was capitalised to Sſ at the beginning of sentences or similar. I am not aware of all-caps being used (which was very rare in blackletter in general).
