The Reformed Christian Calvinist Church in Croatia became an autonomous church in 1993, following the disintegration of Yugoslavia. Croatia became an independent state. The first organising Synod was held in Retfala (Rétfalu) on January 30, 1993. The Reformed Church in Yugoslavia the predecessor denomination was founded in 1933, formerly it was part of the Reformed Church in Hungary. These are mostly Hungarian speaking congregations, which organised themselves as a church in 1551. There are a few Czech speaking and Croatian churches.