Holy Spirit Church in Bale is remarkable for its colourful frescoes on the ceiling and walls. It was built in the 15th century. Its interior, constructed with regular stone blocks with stone pavement-slates, is decorated with fresco paintings by Albert from Constance. Together with usual scenes of the Christological cycle on the sanctuary side walls, Albert also painted the scene of the Throne of Mercy with the saints on the wall abovethe altar. The frescoes at the entrance of the church depict angels and hell.
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.