As the world marks Holocaust Memorial Day on Sunday (January 27), PinkNews remembers all those in the LGBT+ community that were persecuted by the Nazis—and how the pink triangle, used to identify gay or bisexual men in concentration camps, became a symbol for gay rights. When Adolf Hitler and his Nazi Party seized power in Germany in July 1933, the dictatorship moved to persecute and murder minority groups, including Jews, LGBT+ people, the Romani people, and political prisoners. Beginning in 1933, the Nazis built a network of concentration camps throughout Germany, where “undesirable” groups were detained, including Jewish people and gay men.