King Christian III of Denmark reigned from 1534 to 1559 and was a significant figure in Danish history. He was the first king of Denmark to embrace the Protestant Reformation, which led to the establishment of the Lutheran Church as the state religion. His reign marked a shift from Catholicism to Protestantism, influencing the religious landscape of Denmark. Christian III also focused on strengthening the Danish monarchy and centralizing power. He implemented various reforms in governance and the economy, which helped stabilize the kingdom after the Count's Feud, a civil war that had weakened Denmark. His efforts laid the groundwork for a more modern state.