Gorm the Old was a king of Denmark who reigned during the early 10th century. He is often recognized as the first historically documented king of Denmark and is known for uniting various tribes under his rule. Gorm was a member of the House of Knýtlinga and is sometimes referred to as Gorm the Old due to his age at the time of his reign. Gorm's reign marked the beginning of the Viking Age in Denmark, and he is credited with laying the foundation for the future Danish monarchy. His son, Harald Bluetooth, succeeded him and is famous for converting Denmark to Christianity, further shaping the region's history.