The stories and experiences of those in the LGBTQ+ community have been lost to the history books over time. Though heteronormative society has neglected much of this history, activists in the first gay rights movement ensured that these stories remained preserved. The first gay rights movement, referred to as the homosexual emancipation movement, began in Imperial Germany between 1871 and 1914, flourished throughout the Weimar Republic between 1919 and 1932, and ended abruptly in 1933 during the Third Reich. Through the works of Dr. Magnus Hirschfeld, Adolf Brand, and Hans Blüher, once again, the history of this movement could come alive, and scholars can take a deeper examination into the birth of the homosexual identity in Berlin and the early-twentieth-century research on gender and sexuality. The present thesis is meant to delve into the visibility of the homosexual identity in Germany and explore how the liberation of sexual freedom created the right circumstances to target these sexual minorities by the future Nazi regime. Over three decades, homosexual spaces were established throughout German metropolises, queer publications became a commodity at local kiosks, and gender-bending and sexual expression became a way of life for many, especially in Berlin. Through analyzing the work of Hirschfeld, Brand, and Blüher, this thesis will examine the homosexual third sex that developed perceptions of feminine stereotypes established by Hirschfeld’s biological theories based on eugenics. In addition, Brand and Blüher promoted hypermasculine homosexuality built off the traditional masculine ideal and on qualities of male bonding. And while conservatives believed the third sex perverted the national German state, they also perceived the hypermasculine homosexual to subvert it. Despite their dedicated work for homosexual liberation in the country, these activists inadvertently normalized perceptions of biological degeneracy for the homosexual minority. They added to the increased fears of the feminization of German society and its path to moral decay, which the Nazis exploited in the campaign to eradicate homosexuality from the country.