Trieste is the capital city of the Friuli Venezia Giulia region in northeast Italy. Founded by the Ancient Romans, it stands on the Adriatic coast below the Karst Plateau, a few kilometers from the border with Slovenia. Historic Italian, Austro-Hungarian and Slavic cultural influences are all evident in its layout, which encompasses a medieval old city and a neoclassical Austrian quarter. Trieste was one of the oldest parts of the Habsburg Monarchy. In the 19th century, it was the most important port of one of the Great Powers of Europe. The average temperatures are 5.4 °C (42 °F) in January and 23.3 °C (74 °F) in July. There is a castle, archaelogical sites, museums and art galleries in Trieste.