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 In the 1970s, newly active European and North American gay liberation advocates began to use the pink triangle to raise awareness of its use in Nazi Germany. In 1972, gay concentration camp survivor Heinz Heger's memoir "Die Männer mit dem rosa Winkel" ("The Men with the Pink Triangle") brought it to greater public attention. In response, the German gay liberation group Homosexuelle Aktion Westberlin issued a call in 1973 for gay men to wear it as a memorial to past victims and to protest continuing discrimination. In the 1975 movie "The Rocky Horror Picture Show", the bisexual, transvestite character Dr.