Pink triangle and the LGBT rights movement. In Nazi concentration camps, each prisoner was required to wear a downward-pointing, equilateral triangular cloth badge on their chest, the color of which identified the reason for their imprisonment. Early on, homosexual male prisoners were variously identified with a green triangle (indicating criminals) or red triangle (political prisoners), the number "175" (referring to Paragraph 175, the section of the German penal code criminalizing homosexual activity), or the letter "A" (which stood for "Arschficker", literally "ass fucker"). Later, the use of a pink triangle was established for prisoners identified as homosexual men, which also included bisexual
Pink triangle men and transgender women. (Lesbian and bisexual women and trans men were not systematically imprisoned; some were, and classified as "asocial", wearing a black triangle.) The pink triangle was also assigned to sexual offenders, such as rapists and pedophiles. If a prisoner was also identified as Jewish, the triangle was superimposed over a yellow second triangle pointing the opposite way, to resemble the Star of David like the yellow badge identifying other Jews. Prisoners wearing a pink triangle were harshly treated, even by other prisoners. While the number assigned a pink triangle in German concentration camps is hard to estimate,