Karlskrona is a city in south-eastern Sweden. It is the seat of Karlskrona Municipality and of Blekinge County. Karlskrona is an outstanding example of a late-17th-century European planned naval city. The original plan and many of the buildings have survived intact, along with installations that illustrate its subsequent development up to the present day. In 1998 Karlskrona became item no. 560 on UNESCO's list of irreplaceable World Heritage Sites.