The University of Salamanca was founded in 1134 and given the Royal charter of foundation by King Alfonso IX in 1218. It is the oldest founded university in Spain and the third oldest university in the world in continuous operations. The formal title of 'University' was granted by King Alfonso X in 1254 and recognized by Pope Alexander IV in 1255.
Set of buildings that made up the university are situated around the square known as Patio de Escuelas. In this same square is the home of the Doctors of the Queen (15th century), whose façade is Gothic with Renaissance details and is now the Museum of Salamanca.
References:What an amazing structure. Who designed and built it?
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.