Kronborg (Danish pronunciation: [ˈkʰʁoːnˌpɒˀ]) is a castle and historical stronghold in the town of Helsingør, Denmark. Immortalised as Elsinore in William Shakespeare's play Hamlet, Kronborg is one of the most important Renaissance castles in Northern Europe. It was inscribed on the UNESCO World Heritage List in 2000.
The castle is situated on the extreme northeastern tip of the island of Zealand at the narrowest point of the Øresund, the sound between present Denmark and the provinces of present Sweden. The latter were under Danish control at the time the castle was built. In this part, the sound is only 4 kilometres (2.5 mi) wide, hence the strategic importance of maintaining a coastal fortification at this location commanding one of the few outlets of the Baltic Sea.