King Stefan the First-Crowned was the first king of Serbia, reigning from 1217 to 1228. He was a member of the Nemanjić dynasty and played a crucial role in establishing the Serbian state. His coronation marked the transition of Serbia from a principality to a kingdom, solidifying its independence and influence in the region. Stefan was known for his efforts to strengthen the church and promote Christianity in Serbia. He worked closely with the Roman Catholic Church and the Eastern Orthodox Church, fostering religious unity. His reign laid the foundation for future Serbian kings and the development of the Serbian nation.