Central Croatia refers to the areas of the Republic of Croatia that were part of the Habsburg Kingdom of Croatia which excluded Istria, Slavonia, and Dalmatia. Today the term is used in geography to refer to the region of Croatia that centers around Zagreb, with Varaždin in the north and Karlovac and Sisak in the south. It covers around a third of the country's territory and around a half of the country's population. Of course the largest city within the region is Zagreb, the country's capital. It is situated in the northwest, along the Sava river, at the southern slopes of the Medvednica mountain. The city boasts a charming medieval 'old city' with architecture and cobbled streets reminiscent of other Central-European capitals, though mixed with a strong Italian influence.