The Palace, still the residence of the Lantieri family today, is one of the most prestigious noble residences in Gorizia.

Built around 1350 near the city's eastern gate, the palace served as a guesthouse for the Counts of Gorizia, housing guests who participated in hunting expeditions and knightly tournaments. The castle was equipped with a guardhouse located near the tower, equipped with a drawbridge, which served as the city's gateway to the Karst Plateau, to the southeast. Known as Schönhaus ("beautiful house"), upon the death of the last Count of Gorizia, Leonardo, the building was bequeathed to the physician Pozzo, who in 1505 sold it to Antonio Lantieri. In 1513, the Lantieri family received the fiefdom of Schönhaus from Emperor Maximilian I, beginning construction of the 16th-century wing of the palace, later enriched internally with precious fresco cycles, some of which still survive. Particularly curious is the series of panels with allegorical figures, dating back to the mid-18th century and created on the vaults of a portico in the lower wing.

During the 18th century, the residence welcomed numerous illustrious guests, including Carlo Goldoni and Giacomo Casanova. In 1782, Pope Pius VI also stayed here on his way to Vienna, as commemorated by a plaque in the portico. In recent years, the palace's rooms have been enriched with works by contemporary artists, creating an interesting dialogue with the ancient atmosphere that pervades the rooms.