Albrechtsberg Castle was probably built in the 12th century and was documented first time in 1230. It belonged to Protestant Neidegger family from 1377 until 1527 and was badly damaged in Hussite Wars. Knight Erasmus von Peuckham converted it into a Renaissance style residence in the 16th century. The castle was again damaged during the Thirty Years' War.
The towering, irregular structure largely dates from the second half of the 16th century. It is characterized by its high, crenellated ring wall, which features prominent watch and defense towers with numerous keyhole slits. The three-story, multi-winged complex includes three courtyards, a southern entrance through a round-arched portal marked '1675' in the gable field, and a main gate in the northeast with a machicolation. One courtyard contains a cross-vaulted arcade on squat columns. Additional features include a smoke kitchen with a pyramid chimney, cross-vaulted rooms, a wooden ceiling marked '1604,' and an 18th-century granary with a hipped roof. The castle chapel houses the burial site of the Neidegger family.
Duino Castle was built by the Wallsee family in 1389 on the cliffs overlooking the Gulf of Trieste. It replaced an older castle from the 11th century. Over time, the Wallsee family disappeared and the castle, after having been used as a prison, became the residence of the Luogar and Hofer.
At the end of the 19th century it became the property of Prince Alexander von Thurn und Taxis from the Czech branch of the House of Thurn and Taxis. It remains with the family to this day with his great-grandson Prince Carlo Alessandro della Torre e Tasso, Duke of Castel Duino the current owner. The castle has been opened to the public as a museum and park.