Pedraza Castle dates from the 13th century and it was rebuilt in the 15th century by García Herrera and again in the early 16th century by the Dukes of Frías.
Poligonal ground plan, double enclosure, with cues and square turrets, plus an artificial moat excavated in the rock. The castle uses part of the wall and preserves the remains of one front, with Romanesque elements.
The tower that serves as the tower of homage uses a different bonding that the rest of the castle. It used to be owned by the Herrera and the Velasco (Dukes of Frías) families. The sons of the king of France, Frans I, were kept hostage in this castle in the 16th century.
The Church of St Donatus name refers to Donatus of Zadar, who began construction on this church in the 9th century and ended it on the northeastern part of the Roman forum. It is the largest Pre-Romanesque building in Croatia.
The beginning of the building of the church was placed to the second half of the 8th century, and it is supposed to have been completed in the 9th century. The Zadar bishop and diplomat Donat (8th and 9th centuries) is credited with the building of the church. He led the representations of the Dalmatian cities to Constantinople and Charles the Great, which is why this church bears slight resemblance to Charlemagne's court chapels, especially the one in Aachen, and also to the Basilica of San Vitale in Ravenna. It belongs to the Pre-Romanesque architectural period.
The circular church, formerly domed, is 27 m high and is characterised by simplicity and technical primitivism.