István, also known as Stephen, was the first King of Hungary, reigning from 1000 to 1038. He is credited with establishing the Christian state in Hungary and played a crucial role in the country's early development. His reign marked the transition from paganism to Christianity, which significantly influenced Hungarian culture and society. Stephen was canonized as a saint by the Catholic Church in 1083, and his feast day is celebrated on August 20. He is recognized as a national hero in Hungary, symbolizing unity and the foundation of the Hungarian state. His legacy continues to be honored in various cultural and religious traditions.