Château de Gramont was first mentioned in 1329, belonging to the lords of Gramont. The medieval castle was destroyed in 1523 by the troops of Charles V of Spain and reuilt later with Renaissance additions. The gardens and terraces date from the 17th century.
In 1793 , the castle and its outbuildings were confiscated to the Nation and a military hospital was installed there for a few months. The building was empty when it was ravaged by fire in 1796.
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.