Pietra Castle is built on a huge boulder detached from Cengio Rosso. It is located in a strategic location which marked the long border between the Italian Tyrolean territories, Bishopric of Trent and Republic of Venice. When the Venetians tried to go to the north, between the15th and 16th century , they were stopped by the Principality and the Austrians with important pitched battles that took place near the castle.
Its rooms are decorated in a Gothic style. Worth of mentioning is the 'Hall of Justice', strictly gothic atmosphere illuminated by windows with a particular form in Guelph and adorned with frescoes from the 15th century.
The castle is restored and today privately owned and inhabited.
References: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.