On Saturday, November 5, thousands took to Buenos Aires’ famed Plaza de Mayo to celebrate the 20th Anniversary Buenos Aires Gay Pride Parade,  known locally as the “Marcha del Orgullo” (“Pride March”).

Argentina has the strongest record on gay rights in South America—homosexuality was decriminalized  way back in 1887 and both same-sex marriage and LGBT adoptions were legalized in 2010. But a number of participants carried signs in support of trans equality and the right to change gender on the national ID.

Click through for a slideshow of Buenos Aires Pride 2011

Photos by Beatrice Murch