Brdo Castle is the first Renaissance castle in Carniola. In 1510, Emperor Maximilian I of Habsburg signed a permit for the construction of Brdo Castle, and Jurij Egkh then built it. During the Protestant era, Brdo Castle was an important center of development, and Trubar also stopped here in 1562. In gratitude for his support of Protestantism, the then owner, Adam Brdski, received one of the first copies of the Dalmatian Bible. The castle also houses the original Slava duchy of Carniola, in which the Slovenian region was first presented as part of Europe in 1689. With the arrival of the Zois family, Brdo achieved international fame, and the world-famous botanist Baron Karel Zois also arranged the first Alpine botanical garden here. In the previous century, the Yugoslav royal family Karađorđević occasionally stayed in the castle, and after World War II, Josip Broz Tito used the castle as a summer and protocol residence during his visits to Slovenia.
The two-story mansion with four prominent corner towers and intermediate wings has been rebuilt several times. The mansion is furnished with period furniture, carpets, books, paintings and statues. There is a high-quality collection of statues and paintings by the Independents (painter: Zoran Didek, France Mihelič, France Pavlovec, Maksim Sedej; sculptors: Boris and Zdenko Kalin, Karel Putrih and Frančišek Smerdu). Brdo Castle is the central protocol building of the Republic of Slovenia, therefore public tours are only allowed in exceptional cases.