Stephen I of Hungary

Born around 975 in Esztergom to a baptized grand prince and given the pagan name Vajk, Stephen was the first in his family to embrace Christianity with real conviction. After his father's death in 997, he fought off his relative Koppány - backed by pagan warbands - with the help of foreign knights and loyalist lords, then took a crown from Pope Sylvester II on Christmas 1000 or New Year's 1001. Over the next decade he crushed semi-independent tribes, including the Black Hungarians and his own uncle Gyula the Younger, knitting the Carpathian Basin into a single kingdom. He forced out Conrad II's invasion in 1030, founded an archbishopric and six bishoprics to anchor an independent Hungarian Church, and punished those who clung to the old ways. His county system and church network held, and Hungary became a stable corridor for pilgrims and merchants crossing between Constantinople and the West. He outlived all his children and died on 15 August 1038, buried in the basilica he'd built at Székesfehérvár; the civil wars that followed proved how much had rested on him alone.