As the Bard Fortress, Champorcher Castle also belonged to the powerful Lords of Bard, until the fratricidal war between William and Hugo in 1212. Little is known of this early building: we know that it was burned down by order of Hugo of Bard, which might suggest that it was constructed mostly of wood, like many buildings in the late Middle Ages. It was probably reconstructed in the same century, and definitely before 1276, when already it needed to be roofed with wooden tiles.
Following the popular tradition, the castle was built on the Corseria (currently the sacristy), with a chapel that would later become the first parish church.Of the ancient building, it remains the square-plan tower (about six metres per side) with swallowtail merlons south-west of the church. It was used during the Middle Ages as a watchtower. Access is via a door which is can only be reached using a ladder placed four metres above the ground.
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.