John I of Denmark was a king who ruled from 1481 to 1513. He was born in 1455 and was a member of the House of Oldenburg. His reign was marked by efforts to strengthen the Danish monarchy and improve the economy, although he faced challenges from the nobility and external threats. During his rule, John I also sought to maintain peace in the region, particularly with neighboring countries like Sweden and Norway. He is known for his attempts to consolidate power and navigate the complex political landscape of Northern Europe during the late 15th and early 16th centuries.