Born a pagan, he was baptized at about the age of ten, together with his father, chief of the Magyars, a group who migrated to the Danube area in the ninth century. At 20 he married Gisela, sister to the future emperor, St. Henry. When he succeeded his father, Stephen adopted a policy of Christianization of the country for both political and religious reasons. He suppressed a series of revolts by pagan nobles and welded the Magyars into a strong national group. He sent to Rome to get ecclesiastical organizationand also to ask the pope to confer the title of king upon him. He was crowned on Christmas day in 1001.
Stephen established a system of tithes to support churches and pastors and to relieve the poor. Out of every 10 towns one had to build a church and support a priest. He abolished pagan customs with a certain amount of violence, and commanded all to marry, except clergy and religious. He was easily accessible to all, especially the poor.
In 1031 his son Emeric died, and the rest of his days were embittered by controversy over his successor. His nephews attempted to kill him. He died in 1038 and was canonized, along with his son, in 1083.