Council on Foreign Relations, a think-tank, at least 10 countries in Central and Eastern Europe enforce a constitutional ban on gay marriage.
In the case of Croatia, the constitutional ban was voted by referendum in 2013, although the country’s parliament allowed civil partnerships a year later.Estonia also allows civil unions, while the Czech Republic and Hungary recognise same-sex partnerships.Even if the European Union does not require member countries to legalise same-sex marriage, the EU’s top court said in a 2018 ruling that the rights of same-sex couples to freedom of movement and residence must be upheld.In 2015, the European Parliament in a report encouraged the EU and its member states to "reflect on the recognition of same-sex.