Valdemar the Great was a Danish king who ruled from 1154 to 1182. He is known for his efforts to strengthen the Danish monarchy and expand its territories. Valdemar successfully united various regions of Denmark and worked to consolidate royal power, which helped lay the foundation for a more centralized government. During his reign, Valdemar also focused on promoting Christianity in Denmark, supporting the establishment of churches and monasteries. His leadership contributed to the growth of trade and commerce, enhancing Denmark's economic stability. Valdemar's legacy is remembered as a significant period in Danish history.