Amsterdam has marked 20 years since the world’s first gay marriages by floating an inflatable pink cake with candles spouting rainbow flames down the canal.Twenty years ago on April 1, the city was host to a historic event when the mayor married four couples in the city hall and the Netherlands became the first country in the world to legally recognise same-sex marriage.The celebrations on Thursday mark a milestone after two decades when LGBT rights have flourished in many parts of Europe and further afield, with 16 countries in western Europe having now legalised same-sex marriage.But activists warn that the work is not done.According to Evelyne Paradis, Executive Director of ILGA, the emergence of authoritarian and populist politics and.