Pink triangle
A pink triangle, pointing downwards, was used on badges worn by homosexual men in Holocaust camps. Wikipedia alleges that it was a "badge of shame", but offers no evidence for this or that this symbol would have been intended to be more shameful than the many other symbols used to identify different groups of prisoners.
After the war, Allied-controlled East Germany and West Germany continued to imprison certain homosexuals, as was the case also in other countries.
More recently a pink triangle, sometimes pointing upwards, has been used by as a positive symbol of self-identity by some LGBT individuals and organizations.
