- Nyborg is a city located on the eastern coast of the island of Funen in Denmark. It is the third-largest city on Funen and has a population of approximately 17,000 people. Nyborg has a rich history and was once an important center for trade and commerce in the Middle Ages. The city is known for its medieval castle, Nyborg Slot, which was built in the 12th century and served as the seat of the Danish kings. Today, Nyborg is a charming coastal town with a picturesque harbor, historic buildings, and a vibrant cultural scene. The city also hosts various events and festivals throughout the year, attracting both locals and tourists.