Baeza is a city and municipality of Spain belonging to the province of Jaén. It is now principally famed for having some of the best-preserved examples of Italian Renaissance architecture in Spain. Along with neighbouring Úbeda, it was added to UNESCO's list of World Heritage Sites in 2003.
Established in the Roman times, the sixteenth century was the golden era of Baeza (and nearby Úbeda). It grew rich from several industries, notably textiles, and the noble families, which were well connected with the Spanish Imperial state. They hired major architects of the era to design the present cathedral, churches, public buildings, and private palaces in the then-fashionable Italian style. The town's university building dates to 1533. The city declined in importance in the seventeenth century, with the only remaining industry consisting of local production of grain and olive oil. As few newer structures were built during this period, this had the effect of preserving the town's Renaissance legacy.
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.