Landhaus previously was the site of the meeting of the Styrian parliament (in Styria also included parts of modern Slovenia and Italy). Now it meets the federal state parliament.

In the XVI century the building was rebuilt under the guidance of the Italian architect Domenico del Alliot. Facade with a balcony and a large semicircular windows designed in the Venetian style.

In the courtyard note the magnificent three-story arched gallery of the Renaissance. Ladder patio - the work of Italian architect Bartolomeo di Bosio.

Interior of a conference hall in the style of Baroque, carved doors and ceilings - stucco. Equally well-decorated, and the Knights' Hall.