Ethnic groups in Hungary include Magyar (nearly 90%), Romany, German, Serb, Slovak, and others. The majority of Hungary’s people are Roman Catholic; other religions represented are Calvinist, Lutheran, Jewish, Baptist, Adventist, Pentecostal, and Unitarian. Magyar is the predominant language. Hungary has long been an integral part of Europe. It converted to Western Christianity before AD 1000. Although Hungary was a monarchy for nearly 1,000 years, its constitutional system preceded by several centuries the establishment of Western-style governments in other European countries.