Wikipedia
Quarteera
Quarteera is a Russian-speaking non-profit volunteer LGBT registered association in Berlin, Germany. The association was officially registered in April 2011 and calls itself the "Russian-speaking group of gay, lesbian, bisexual, transgender people and their friends in Germany". The name plays on the words queer, art and quarter.
The association was first founded in 2009, when several activists organized the so-called "Rainbow Flashmob" on May 17 where, in honor of the International Day Against Homophobia, Biphobia and Transphobia, thousands of colorful balloons were released into the sky.