Between 2010 and 2018, there were significant changes in Hungary in the legislation on churches, religious associations and religious communities, in particular with regard to the provisions on the constitutional status, recognition and registration of religious communities. The main consequence was the deprivation of the previously acquired legal status of more than 300 religious communities. It is therefore reasonable to ask: what were the reasons and circumstances that justified and triggered such a profound and intense transformation? What social challenges did the law have to face that led to such serious consequences? In reviewing the changes in the legislative environment since 2010 in Hungary, the following aspects will be examined in this chapter: (1) the cause(s) of the change in the legislative environment; (2) the purpose(s) of the change in the legislative environment; (3) the result(s) of the change in the legislative environment; (4) the consequence(s) of the change in the legislative environment.