City of Graz – Historic Centre and Schloss Eggenberg, Medieval urban ensemble in Graz, Austria.

The site joins Graz's historic centre, bounded roughly by the Mur and the Schloßberg, with Schloss Eggenberg about 3 km west of the centre at the foot of the Plabutsch. The palace was built 1625–1635 for Hans Ulrich von Eggenberg to designs by Pietro de Pomis in the transition from Renaissance to Gothic, and its park and avenue form the second core zone.

Graz's documented history begins in the 10th century, when Slavic settlers built a fort on the hill called Schlossberg; the name Graz derives from the Slavic word gradec, meaning 'small castle'. In the 14th century the Leopoldine line of the Habsburgs made Graz its residence, and Frederick III, later Holy Roman Emperor, was born there in the 15th century, making the city the imperial capital. From the 15th century, Ottoman invasions prompted reinforcement of the Schlossberg fortress and the city's defenses. Under Archduke Karl II, Graz founded its university and Jesuit schools; his son Ferdinand II moved the court to Vienna, while Hans Ulrich von Eggenberg built Schloss Eggenberg outside the city between 1625 and 1635.

The Landhaus serves as a gathering place for regional administration while its spaces host exhibitions about Styrian history and culture. Visitors can see how government and cultural life remain intertwined in daily civic practice.

The core zone follows the line of the old city wall, from the Mur through Kaiserfeldgasse, Opernring, Burgring and Parkring to the Schloßberg summit. Schloss Eggenberg lies about 3 km west of the historic centre, at the foot of the Plabutsch, in the Eggenberg district. Street signs and house numbers inside the World Heritage area use a special UNESCO design.

The palace displays striking astronomical symbolism with 365 windows representing the days of a year built into its design. Twenty-four state rooms arranged according to the hours of the day reveal how Renaissance architects encoded cosmic order into the building's structure.