In the early 11th century, Canute the Great won and united Denmark, England, and Norway for almost 30 years with a Scandinavian army.Throughout the High and Late Middle Ages, Denmark also included Skåneland (the areas of Scania, Halland, and Blekinge in present-day south Sweden) and Danish kings ruled Danish Estonia, as well as the duchies of Schleswig and Holstein.
The Kingdom of Denmark also comprises two autonomous constituent countries in the North Atlantic Ocean: the Faroe Islands and Greenland.
Denmark proper consists of a peninsula, Jutland, and an archipelago of 443 named islands, with the largest being Zealand, Funen and the North Jutlandic Island.
The islands are characterised by flat, arable land and sandy coasts, low elevation and a temperate climate.
Denmark has an area of 42,924 km Denmark, Sweden and Norway were ruled together under the Kalmar Union, established in 1397 and ending with Swedish secession in 1523.
Under the reign of Gudfred in 804 the Danish kingdom may have included all the lands of Jutland, Scania and the Danish islands, excluding Bornholm.