The castle of Bovino was built by the Norman Count Drogone and later expanded by Frederick II, and in the 1600s it was transformed into a noble residence by the dukes of Guevara. Currently inhabited by the descendants of the Guevara family, in the past it was one of the most beautiful patrician residences in the South of Italy.
The Norman tower exists and is supported by a massive barbacane, in pyramidal shape. The construction is still retains good, between rocks and walls that partly retain vestiges of roman and hanging gardens. The castle stands on a rocky spur and overlooks the whole valley, famous for the raids of the bandits who, until the advent of united Italy, took to assaulting and plundering caravans and coaches that, from the Campania Region, to reach the Adriatic coast, were forced to pass through this narrow and dangerous throat between the mountains. The rooms of the Palazzo Ducale offer the visitor the possibility to appreciate the rich decor and visit the small but charming private chapel with majolica floor, where there is preserved a fragment of Sacred Plug, nestled in a cross of admirable workmanship, together with many relics of saints including a particle of purpura of Jesus Christ.
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.