The dialogue between the European Union and the Churches has developed in an informal way over the past years on the initiative of EU officials and Church organisations based in Brussels, but without enjoying a legal basis. It was kept alive by the Churches' and religious communities' dynamism and by the good will and availability of senior representatives from the European institutions. The entry into force of the Lisbon Treaty has created legally binding grounds for the first time in the history of the EU, for the dialogue between the EU and the Churches and religious communities.