TheReformed Diocese of Királyhágómellék orKirályhágómellék Reformed Church District (Hungarian:Királyhágómelléki Református Egyházkerület;Romanian:Episcopia Reformată de pe lângă Piatra Craiului) is one of the two dioceses of theReformed Church in Romania, with its headquarters inOradea. It was part of the Reformed Diocese of Tiszántúl of theReformed Church in Hungary from the 16th century until 1920, when it came under Romanian administration in accordance with theTreaty of Trianon and became part of the newly founded Reformed Church in Romania.[1] In 2004, it had 320,000 members in 271 congregations and 342 house fellowships. TheApostles Creed, theHeidelberg Catechism and theSecond Helvetic Confession are the official standards.[2]