Nadja Schallenberg was born in East Berlin and became the first and only transsexual civil rights activist in the former GDR. She is the founder oft he first community of interest for transvestites and transsexuals in the GDR. After the reunification, she founded and managed the contact and counselling center for transsexuals and transvestites at Sonntags-Club Berlin. For more than ten years, Schallenberg provided legal support for transsexual people and was involved in the reform of the TSG (transsexual law) of the Federal Republic of Germany, among other things with a successful lawsuit at the Federal Constitutional Court for the abolition of the age limit for changing first names.