Today, Berlin is largely seen as one of the world's most queer-friendly cities — and that was also the case roughly a century ago, before the National Socialists took power in the early 1930s.  In the 1920s, during the era known as the  Weimar Republic  in Germany, Berlin became not only a haven for queer nightlife but also one of the world's most important centers for early LGBTQ+ research, activism and community building, helping to shape modern thought about sexuality  and gender.  In 1871,