South Holland is a province of the Netherlands. It has a population of just over 3.5 million (as of 2013) and a population density of about, making it the country's most populous province and one of the world's most densely populated areas. Situated on the North Sea in the west of the Netherlands, South Holland covers an area of, of which is water. It borders North Holland to the north, Utrecht and Gelderland to the east, and North Brabant and Zeeland to the south. The provincial capital is The Hague, while its largest city is Rotterdam.HistoryEarly historyArchaeological discoveries in Hardinxveld-Giessendam indicate that the area of South Holland has been inhabited since at least ca. 5500 B.C., likely by nomadic hunter-gatherers. Agriculture and permanent settlements likely originated around 2,000 years later, based on excavations near Vlaardingen. In the classical antiquity, South Holland was part of the Roman Province of Germania Inferior, and the border of the Roman Empire ran along the Old Rhine and reached the North Sea near Katwijk. The Romans built fortresses along the border, such as Praetorium Agrippinae near modern-day Valkenburg, Matilo near modern-day Leiden, and Albaniana near modern-day Alphen aan de Rijn. A city was founded near modern-day Voorburg, Forum Hadriani. It was built according to the grid plan, and facilitated a square, a court, a bathhouse and several temples.