The Gostilitsy Trinity Church was built between 1755 and 1764 in barocco style. It has an oval shape and a low dome. The church was closed in 1939 and disused since the 1980s. In 1993, it was transferred to Russian Orthodox Church and restored. Currently it is the oldest and the best preserved building of the estate.
References: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.