Well done! You discovered that the Stonewall Inn (at 53 Christopher Street) was the location of the 1969 riots which began the Pride movement.​ There were many other protests and marches before this; and, in 1970, on the anniversary of this riot the first Pride marches happened across the USA leading to the annual celebration we know today worldwide! 

Your next clue​:

Which friend of Michael Dillon faced a painful struggle and became the first British trans woman to undergo a life and identity affirming surgery?​