The Kingdom of Sweden (Swedish: Konungariket Sverige), or simply known as Sweden (Swedish: Sverige), was a democratic Scandinavian monarchy located in Northern Europe that existed in three periods, the first one from 16th century until 1893, second one during 1920s and third one during early 21st century. As in all periods, it borders Norway to the west and Finland to the east, and in 2000 is connected to Denmark in the southwest by a bridge-tunnel across the Öresund. Sweden was a constitutional monarchy and a parliamentary democracy, with the Monarch as the head of state. Legislative power was vested in the 349-member unicameral Riksdag. Executive power was exercised by the Government, chaired by the Prime Minister. After 1997, Sweden was a unitary state, divided into 21 counties and 290 municipalities.