king of Denmark (1286–1319) under whom the conflict between church and monarchy, which had first arisen during the rule of his grandfather Christopher I, reached its peak and was tenuously resolved. Erik's attempts to renew Danish conquests along the southern Baltic coast greatly weakened the country's finances and aroused opposition to his rule.

The son of Erik V, Erik succeeded to the Danish throne in 1286 after the murder of his father. His rule was soon challenged by several magnates who had been found guilty—probably unjustly—of killing his father and had been outlawed in 1287. These outlaws, who were aided by the Norwegian king and soon joined by Duke Valdemar of Schleswig and the new archbishop, Jens Grand, raided the Danish coasts. Erik defeated Valdemar and reached an agreement with Norway in 1295, but he continued to feud with Grand, whose imprisonment led to a papal interdict of the king in 1297.

Erik's settlement with Pope Boniface VIII (1303) enabled him to resume Danish conquests along the northern border of the Holy Roman Empire, and in 1304 the emperor Albert I ceded to Denmark all lands north of the Elbe River. Toward the end of his reign, Erik lost the allegiance of most of his German vassals and retained only Rostock and Rügen. The final years of his reign were plagued by renewed conflict with Norway and Sweden and growing opposition from the church, peasants, and nobles, including his brother and successor, Christopher. The financing of Erik's military campaigns almost bankrupted Denmark, and Erik was forced to mortgage large areas of the kingdom to raise funds. He died childless.