Norman Eisen, the U.S. Ambassador to the Czech Republic, on Saturday marched in Prague's second annual gay pride parade.
The parade wound its way from central Wenceslas Square to an island in the Vltava river, where revelers enjoyed a series of concerts and shows.
“We estimate that between 10,000 and 15,000 people took part,” festival spokeswoman Kamila Froehlichova told European news service AFP.
Helming the parade was Anna Grodzka, the first transgender member of the Polish parliament.
Speaking at a gay pride reception on Monday, Eisen called himself an ally to the LGBT community.
“Many LGBT Americans have endured violence and harassment for years and confronted bullying and exclusion on a daily basis,” Eisen said. “To LGBT men and women here today and elsewhere, let me say: People all around the globe, in cities like Prague and Washington D.C., are working hard right now to bring attention to these issues. You have an ally in me, in President [Barack] Obama and in the United States of America.”