Last Tuesday, the European Union’s top court ordered Poland to recognize the marriage of a same-sex couple who had wed in Germany. In delivering its verdict, the Court of Justice of the European Union (CJEU) kept the language broad, referring to the obligation of “a member state” to recognize same-sex marriages registered in other EU member states. It means that a Czech, Romanian or Bulgarian court — or any other EU member state where same-sex marriage is not recognized — will now have to take the verdict into consideration if a similar case arises in their jurisdiction. The case in...