Kalundborg is a Danish city situated on the northwestern coast of the largest Danish island, Zealand. Mainly a trading and industrial town, Kalundborg is known for being the location of the Kalundborg transmitter, a large broadcasting facility, and also the largest coal-fired power station in Denmark. Originally settled in 1170 at a natural harbour at the head of the narrow bay today known as Kalundborg Fjord, it became more urbanized during the nineteenth century and had since developed into a major industrial centre. Apart from its industrial symbiosis, the city is also known for the Church of Our Lady, which is closely associated with King Valdemar I and the famous Archbishop Absalon.