Nyborg is a city in central Denmark, located in Nyborg Municipality on the island of Funen and with a population of 17,900 (2023). It is the easternmost settlement on Funen. By road, it is located 34 km east of Odense, 35 km north of Svendborg and 21 km south of Kerteminde. It also connects to Korsør through the Great Belt Bridge. Nyborg is the seat of Nyborg Municipality, and until 1793 it was also the seat of Nyborg County.
The city was founded in the 1200s, built up around Nyborg Castle. The castle holds a central place in Nyborg geographically, historically and culturally.
Nyborg was first mentioned in 1193 as 'Nyburg', which translates to 'new castle' in Danish.
Before Nyborg was founded, a fortification existed in the area under the name of Gammelborg. It was established in the 500s, and used throughout the Viking age until Nyborg was founded and took over its role.
Nyborg was first mentioned in 1193 in the history of Denmark as Nyborg Castle, which still exists today, but the town itself was not mentioned before the year 1202. From its foundation and until 1413, Nyborg Castle was used by numerous kings as seat of the Danehof and other meetings. The first Constitution of Denmark was written on Nyborg Castle by Eric V in 1282. Being the seat of these meetings, Nyborg enjoyed a number of unique and special privileges, granted by the king. The first was granted by king Valdemar II, who granted the town the status of a market town (Danish: Købstad) shortly after the town was founded. Merchants from neighboring hundreds had to come to Nyborg to sell their wares, boosting the economy and traffic in the town. In 1446, a large number of additional privileges were added, including the outlawing of harbours between the market towns on eastern Funen. Nyborg was also given permission to host a yearly market, and artisans from Vindinge Hundred were told to move to the market towns, boosting the population and economy of Nyborg once more.